The 7 Best Vac-U-Lock Strap-Ons for Secure Strapping

Amanda Nilsen
by Amanda Nilsen
best vac u lock strap on in test
Vac-u-lock strap ons are probably the market’s most robust strap-ons with their two-parted system based on vacuum. If you want to know more about vac-u-lock, how to use it, and if you are interested in finding one that fits you, you´re in the right place. Welcome to Bedbible and our post about Vac U Lock Strap Ons.

The process of testing vac-u-lock strap ons

There are a lot of hours spent on this post and there are a lot of people involved. It’s hours of internet research where we’ve looked for the most popular vac-u-lock strapons, hours of reading customer reviews, comparing and summarizing them. But what about the people? We have talked with our own sexperts – Bedbible’s testers, that has provided us with information about their personal experience. It’s all of this together with our own expertise that we have gained from writing 500+ reviews.

The process of testing vac-u-lock strap ons

 

How to know if a Vac U Lock Strap On is for you?

  • It’s a great option when you want to explore pegging, safe and secure play
  • Enjoy strap on power play
  • If you want to be able to do wild and crazy thrusts and other movements in a safe way
  • If you don’t have a penis but still want to enjoy penetrating your partner
  • If you have a penis but don’t feel like it’s enough, have a problem with erection, or just want to explore another type of penetration

 

Who can use a vac-u-lock?

Anyone can use a vac-u-lock, most harnesses that support the vac-u-lock system are made unisex. That means that it’s possible to wear it no matter what sex you are. Although some don’t have space beloved where the genitals are it means it won’t be comfortable for people with penises to wear them.

FAQ

What is a Vac U Lock?
Vac U Lock is a patented harness system which has a special harness and strap-on lock. It's a plug that locks together with a system built upon vacuum pressure.
How to put on a vac u lock dildo?
You need a Vac-U-Lock Dildo, a Vac-U-Lock harness and a adapter plug. The adapter plug needs to go into the harness plug and that how a vacuum is created and locks it.
How to make a dildo vac u lock?
There are a lot of compatible dildos to use for your vaculock strap on, but if you still want to use your other sex toys you can do a bit of DIY. We have heard from others that you can drill a 5/8 hole in your flared based dildo and fit it. Although we do not guarantee that this works or that your dildo will still be ok.
How to remove a vac u lock plug?
It's pretty much the opposite from how you attach it. Do detach your vac u lock dildo you twist it and pull it away from the harness. If it is stuck then you can tilt it on the side to break the vacuum.
How to wear vac u lock strap on?
When you have added the dildo you need to put it on and adjust the straps so it fits your body.

What is a Vac U Lock Strap On?

Vac U Lock Strap On is a special harness and strap on, a system developed by the brand Doc Johnson. It's a special adapter and plug system attached to a unisex and adjustable strap on harness.

Table of contents (0)

The 7 Best vac u lock strap ons in Test

1 Test Winner

Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn Harness Set

Design:

Rating:

What it is: 

90/100
Ease of Use:

Rating:

What it is: 

100/100
Quality:

Rating:

What it is: 

100/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

If you are looking for sensational penetration, this is your chance! It’s pretty much the only set you need, after all, it’s a 13-piece strap-on kit.

This is included with your vac u lock strap on: 1 x 8-inch dildo, 1 x 7-inch dildo, 1 x slimline dildo, 1 x 7 function vibrating plug with remote, 1 x water-based lubricant, 1 x toy cleaner, 1 x Doc Johnson Vac-U-Powder, 1 x ULTRASKYN Refresh Powder, 3 x O Rings, 1 x adjustable harness, 1 x swiveling hands-free base.

It’s a mix of life-like dildos and straight-shafted ones, possibilities to attach vibrations and a nice realistic skin feel.

Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn Harness Set test
Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn Harness Set features
Recommended for

BeginnerIntermediateAdvanced
You should buy the Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn if you...
Are looking for a vac u lock strap on set
Enjoy variation
Want remote controlled vibrations
Are in the beginning of your strap on journey
Want to use it with multiple partners
You should NOT buy the Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn if you...
Want to combine it with water play
Are a complete beginner (size)
Are looking for just one vac u lock strap on
Doc Johnson Vac-U-Lock Vibrating Dual-Density Ultraskyn Harness Set features
Features
Harness SizeUp to 69" inches
Vibration modes7 
MaterialsRealistic, Thermoplastic Elastomer 
Length8,7 & 7 inches
Diameter1,75, 1,75 & 1,75 inches
Pros
Three different sized and shaped dildos
Attachable vibrators
Available in different colors
Soft skin
Cleaning kit included
Cons
Not waterproof
Basic harness
Conclusion

If you buy this set you will literally be set for life, it’s great for the ones who are a bit more experienced due to the sizes of the dildos. Besides that this set is for everyone, no matter if you like realistic dildos, straight dildos, or vibration.

The only minus we have is the harness, it’s got a pretty boring and basic look. For a vac u lock strap on set this extra it’s a disappointment. But I guess, it is compensated by the feeling.

2 Cheapest

Vac-U-Lock Ultra Harness With Plug

Design:

Rating:

What it is: 

80/100
Ease of Use:

Rating:

What it is: 

90/100
Quality:

Rating:

What it is: 

75/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

This is one of the cheapest vac u lock strap ons you can find on the market, it has got a simple and discrete design. It doesn’t have a lot of straps and it’s got one adjustable buckle for the waist strap. Good to know is that there are not any dildos included, only a small adapter plug to attack a vac-lock dildo.

It is designed with an open crotch and it leaves enough space for people with penises to wear this vac u lock strap on.

Vac-U-Lock Ultra Harness With Plug test
Recommended for

BeginnerIntermediateAdvanced
You should buy the Vac-U-Lock Ultra Harness With Plug if you...
Want to try a strap on without spending a lot of money
Are going to use small-sized dildos
Have a penis (harness with a lot of space)
Are looking for a cheap vac u lock strap on
You should NOT buy the Vac-U-Lock Ultra Harness With Plug if you...
Are looking for a sturdy harness
Want a high-quality vac u lock strap on
Features
Harness SizeUp to 53" inches
MaterialsPVC 
Pros
Space for penis underneath
Easy to use
Simple to adjust
Open crotch
Cons
No dildo included
Not that sturdy
Conclusion

The price has its reasons, it is a good vac-u-lock but not as good as the previous one. Here you don´t get any extra dildos, it’s just the harness. The quality isn´t as good, but still good enough for the one who wants to just try a vac u lock strap on before spending a lot of money.

It’s very easy to use and suits best with small dildos, it gets a bit unstable when using heavier dildos. Great for a newbie to explore pegging and other kinds of strap on play.

3 Beginner

Vac-U-Lock Dual Density Dildo & Plug Starter Set

Design:

Rating:

What it is: 

50/100
Ease of Use:

Rating:

What it is: 

50/100
Quality:

Rating:

What it is: 

50/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

Here we got the perfect vac u lock strap on set for the beginner. First of all the dildos have a suction base that introduces hands-free solo-play, perfect for the one who wants to practice and get the feel before playing with their partner.

You have three different dildos to choose from, they are all in different sizes beginning with 5” and ending up with 7”. They are also all of different textures, one is smooth with a realistic phallic-looking design, the other two have ridged surfaces that will stimulate during thrust movements and one of them has a pair of testicles too.

Vac-U-Lock Dual Density Dildo & Plug Starter Set test
Vac-U-Lock Dual Density Dildo & Plug Starter Set features
Recommended for

BeginnerIntermediateAdvanced
You should buy the Vac-U-Lock Dual Density Strap-On Set if you...
Are a beginner to vac u lock strap on
Want a set for pegging
Enjoy ridged dildos
Want life-like feeling dildos
Enjoy solo hands-free masturbation
You should NOT buy the Vac-U-Lock Dual Density Strap-On Set if you...
Are looking for vibrating vac u lock strap on
Are looking for girthy dildos
Vac-U-Lock Dual Density Dildo & Plug Starter Set features
Features
Length7,6 & 5,5 inches
Diameter2, 1,5 & 1,5 inches
Vibration modesTPE/PP 
Pros
Beginner-friendly
Comfortable harness
Available in different colors
A lot of value for the money
Made from ultraskyn material
Cons
Pretty expensive
Conclusion

With ultraskyn material, a material that makes the dildo have a pliable exterior with a firm inner core these dildos feel very realistic. Thanks to how easy they are to handle it’s great for beginners, even though it is still good to find an even smaller dildo to use for warm-up.

It quickly warms up to body temperature and when it comes to being waterproof it’s submersible. It’s made out of TPE and therefore, compatible with a lot of different lubes and there is one lube included.

4 Big

Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo Set

Design:

Rating:

What it is: 

100/100
Ease of Use:

Rating:

What it is: 

80/100
Quality:

Rating:

What it is: 

100/100
Price:

Rating:

What it is: 

Low

User rating:

Rating:

What it is: 

N/A

Looking for something big, girthy, and fleshy? Here we got a big vac u lock strap on for experienced users. It’s a kit where you get everything you need from dildos to toy cleaners. There are three different dildos, two with veiny shafts and all of them with pronounced heads.

The storage box the set comes in is great to keep for easy storage after use. When using big vac u lock strap-ons like these, lube is a must! Luckily there is lube included, but you will most probably need to buy some more.

Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo Set test
Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo Set features
Recommended for

BeginnerIntermediateAdvanced
You should buy the Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo if you...
Are looking for girthy dildos
Enjoy fulfillment
Have money to spend
Want a set for the experienced users
Are looking for a sturdy harness
You should NOT buy the Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo if you...
Enjoy small dildos
Are a beginner to pegging
Have a penis (no open crotch)
Doc Johnson Vac-U-Lock Realistic Feel Advanced Strap-On Dildo Set features
Features
Harness SizeUp to 69 inches
Insertable length10, 8, 8 inches
Materials Soft Plastic 
WaterproofSplashproof 
Pros
Girthy dildos
Realistic looking
Life-like core
Comfortable to use
Cons
Not naturally positioned
Not for beginners
A struggle for penis users to use as givers
Conclusion

This is definitely not a vac u lock strap-on for the beginner. The three dildos are big and therefore it’s also not really naturally positioned, this means it might be a bit difficult to get the powerful thrust motions going.

The harness is comfortable and the back straps are wide for minimum chafing and maximum comfort. The straps are easy to adjust even when wearing the harness thanks to the wide back strap.

5 Double Penetration

Black Double Penetrator Vac-U-Lock Attachment

Design:

Rating:

What it is: 

88/100
Ease of Use:

Rating:

What it is: 

70/100
Quality:

Rating:

What it is: 

90/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

This is for you who always want more and can’t get enough – the double penetration vac u lock strap on, it’s got two dildos for maximum intense pleasure. It’s created for people with a vulva to experience the ultimate fulfillment.

There is one bigger dildo, which we call the “main dildo” that goes into the vagina and one slimmer dildo meant to be used as an anal dildo. Both dildos have got raised veins on their shaft with clear heads, the anal dildo is a bit more flexible than the main dildo.

Black Double Penetrator Vac-U-Lock Attachment test
Recommended for

BeginnerIntermediateAdvanced
You should buy the Black Double Penetrator Vac-U-Lock Attachment if you...
Enjoy double penetration or want to try
Are an experienced sex toy user
Are aware there is no harness included
Enjoy the feeling of fulfillment
You should NOT buy the Black Double Penetrator Vac-U-Lock Attachment if you...
Are a beginner to anal play
The receiver has a penis
Features
LengthMain Dildo: 6,35 inches
LengthAnal Dildo: 6,35 inches
Insertable lengthMain Dildo: 4,7 inches
Insertable lengthAnal Dildo: 4,7 inches
DiameterMain Dildo: 1 inches
DiameterAnal Dildo: 1,5 inches
MaterialsPVC 
Pros
Intense pleasure
Fulfillment
Flexible anal dildo
Nice details
Cons
No harness included
Conclusion

This double-penetration dildo can be used both for solo orgasms and partner play, be aware that it doesn’t include a harness, this is a reason why the price is so low compared to the other reviewed products.

It’s not for beginners, it’s good if you explored at least anal play before and maybe tried out double penetration once or twice. The anal dildo is very flexible which makes insertion easier for you.

6 Harness

Vac-U-Lock Luxe Strap On Harness

Design:

Rating:

What it is: 

90/100
Ease of Use:

Rating:

What it is: 

90/100
Quality:

Rating:

What it is: 

80/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

This is one of the cheaper vac-u-lock-strap ons and is great for both beginners and more experienced users. This harness is compatible with, of course, the vac-u-lock dildos but also with classic flared-based dildos. This means that your dildos to choose from just got bigger.

It offers great control and the adjustable straps make sure it stays put, it stays in place even when using the heavier dongs.

Vac-U-Lock Luxe Strap On Harness test
Vac-U-Lock Luxe Strap On Harness features
Recommended for

BeginnerIntermediateAdvanced
You should buy the Vac-U-Lock Luxe Strap On Harness if you...
Are new to strap ons
Want to use bot vac-u-lock and flared-based dildos
Enjoy a simple design
Like a sturdy harness
You should NOT buy the Vac-U-Lock Luxe Strap On Harness if you...
The poppers break easily
Vac-U-Lock Luxe Strap On Harness features
Features
MaterialsNeoprene, ABS Plastic 
Harness SizeUp to 69 inches
Pros
Simple and discrete design
Compatible with both vac-u-lock and flare-based dildos
Comfortable to use
Easy to adjust
Cons
Only one small plug included
Poppers are not the best quality
No dildo included
Conclusion

This vac-u-lock-strap-on is very light weighted, easy to put on and take off, and at the same time sturdy during use. What can be a bit difficult is placing the plug into the harness, and the poppers might not be the best quality.

Besides that, the harness is very easy to use and adjust for your body type and comfort. It’s a good entry-level strap-on as well as for the more experienced.

7

Vac-U-Lock Ultra Harness Realistic Cock

Design:

Rating:

What it is: 

60/100
Ease of Use:

Rating:

What it is: 

60/100
Quality:

Rating:

What it is: 

75/100
Price:

Rating:

What it is: 

Low

Bedbible rating:

Rating:

What it is: 

0.0/5.0

User rating:

Rating:

What it is: 

N/A

If you enjoy realistic phallic-looking dildos this is your turn, here we got a vac-u-lock-strap on fitting like a thong. That means it doesn’t leave any easy entrance for the back passage. It does have some space just underneath the realistic testicles which mean the wearer can be a person with a penis.

The shaft is filled with raised veins and a cleared detailed head and two marked testicles.

Includes Vinyl Harness, 7″ Realistic Cock Attachment, Vac-U-Lock Plug, Vac-U-Lock Powder

Vac-U-Lock Ultra Harness Realistic Cock test
Vac-U-Lock Ultra Harness Realistic Cock features
Recommended for

BeginnerIntermediateAdvanced
You should buy the Vac-U-Lock Ultra Harness Realistic Cock if you...
If you enjoy a realistic looking dildo
Want a simple vac-u-lock strap on
Enjoy a bit girthier dildos
You should NOT buy the Vac-U-Lock Ultra Harness Realistic Cock if you...
Are looking for easy behind access
Want a sturdy harness
Are looking for silicone dildos
Vac-U-Lock Ultra Harness Realistic Cock features
Features
MaterialsPVC Dildo, Vinyl Harness, ABS Plastic Plug 
Length7 inches
Diameter1,7 inches
Insertable length6,3 inches
Pros
Nice detailed dildo
Soft surfaced dildo
Girthy dildo
Cons
Not a sturdy harness
Difficult to keep in place
Conclusion

This vac-u-lock-strap on does not have any straps for the butt checks which means it can be a bit difficult to get it to stay in place, it’s not as sturdy as some other strap-ons. Therefore, it can be a bit difficult to do powerful thrusts.

Remember that if you get tired of your realistic dildo you can always change to another vac-u-lock product and explore more.

Need a Dildo for Your Vac-U-Lock Strap-On?

It’s not always that you buy a vaculock strap on that comes with a compatible dildo. And the vac u lock system is a bit tricky in that way, not all strap on compatible dildos are possible to use. We’ve actually written a post about the best vac-u-lock attachments‘ too. But anyway, here are a few recommendations for you who want to add a dildo.

What is Vac-U-Lock?

Vac-u-lock is an attachment system developed by Doc Johnson to create secure strap on play. It’s a two-part system, one adapter that is placed on the harness and one adapter placed inside the dildo. When these are attached you insert the harness adapter inside the dildo adapter and it will create a vacuum suction that makes it remain stable.

This allows wild and crazy, but still safe, strap on play!

How to use a vac-u-lock strap on?

It’s not difficult to use a vac-u-lock strap on and neither does it take long time to put it on, let’s step by step see how it’s done:

 

How to use a vac-u-lock strap on?

Insert the plug

Insert the plug

First you need to insert the plug into your vac-u-lock strap on harness. It might look a bit different depending on which one you have.

Powder it!

How to use a vac-u-lock strap on?

This is not for all vaculock strap on dildos, but for some of them you need to powder the inside to be able to attach the plug, otherwise it will be too much friction.

How to use a vac-u-lock strap on?
How to use a vac-u-lock strap on?

Attach it!

Attach it!

You need to attach the dildo to the plug, this is done be twisting it/wiggling it, or just firmly pressing the hole. This is done until the vacuum has created a suction and is attached close to the harness.

Buckle up!

How to use a vac-u-lock strap on?

Now it’s time to put on your harness and adjust the straps until you feel it close to your body and comfortable enough to do some thrusting.

How to use a vac-u-lock strap on?

How to clean a vac u lock strap on?

It all depends on which one you have bought, we recommend you read the user manual before cleaning, or even using, it. If you don't have it, check what material it's made from both the harness and the strap on, see if there are any electronic functions that you need to be aware of and then follow our guide below.

Porous
materials

Soft plastic, hard plastic, jelly, rubber, Cyberskin are all porous materials, meaning that small particles and bacteria can penetrate the surface. This makes it impossible to completely clean these types of materials.

Therefore, it is recommended that you use a condom with these types of toys, especially if you are sharing them. Clean these toys with mild soapy water and dry gently with a towel. These materials are more easily damaged, so be sure to be gentle and make sure your toys are completely dry before storing.

Non-propous
materials

Silicone, glass, stainless steel and some hard plastics can all be washed using a mild soap (like you would use on your body) and warm water. Just be careful if your toy contains electrical parts.

Silicone and stainless steel toys without any electrical parts can also be boiled for sterilisation.

The toys with electrical
components

If your toys contain electrical components, be extra careful when cleaning them and always check the instructions provided with the toy. You can use a gentle cloth and soap to wipe or sex toy cleaner or cleaning wipe to down your toy, making sure that no water comes into contact with the electrical parts.