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Last updated: May 13, 2025
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A hollow strap on can be great fun for everyone, and in this guide we’ve put together a list of the best hollow strap on models, allowing any couples of any genders to have a great time together and experiment more with their bedroom routines. If you get the wrong hollow strap on dildo though, it might not feel as good for one or both parties, and everyone might end up a little disappointed. Our guide should help to ensure that you only get the very best.
We’ve reviewed a number of models and used criteria such as the type of strap on, insertable length, internal length, dimensions, flexibility and whether or not it is waterproof for use in the bath or with water based lubes. We’ve also looked into the color and design, too, as well as what it is made out of, some materials are far superior to others.
If you are looking for a realistic hollow strapon that is a great option for men and women, this could be ideal for you. It’s made out of PVC with nylon and spandex for the strap itself. The adjustable length around the waist goes up to 38 inches.
This has a firm design, so it isn’t overly flexible, but it has many vibration settings and a remote control that can be used by either partner to give them a more intense pleasurable experience. This is a huge hollow strap on with 8 inches insertable length with an internal length of 6 inches for the wearer to take advantage of.
It’s splashproof, so you can use it with lube and not have issues, but in the bath or shower it should not be used.
Why is it special? The vibration feature is great for both people and gives a real extra dynamic of fun for people. It’s also a very big model which might be exactly what you’re looking for.
What are the flaws? It’s a better fit for people who don’t have overly thick penises. It isn’t the widest, so if you plan to use this as a man, you might find this a struggle.
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Consumer Engagement
Chosen by 8731 people in the past 30 days
9.7
Customer Feedback
Based on cross-platform reviews
9.5
Brand Reputation
Based on web analytics & content of negative reviews
The Fetish Fantasy strap on is one of the most popular models – described as the Unisex Hard-On Hollow Extender, it is great for use by men and women, and has a lot of flexibility, people who are dress size 8-20 can wear this, and it fits the majority of men and women.
It’s totally submersible as it has no electrics, so it is suitable for bath or shower play.
The internal length is 4 inches and the insertable length is six inches, so it gives a bonus of 50% to some penises.
The strap that is worn is a jock-strap style and comes in stretchy and comfortable nylon.
What are our favorite features? The realistic and flexible design, this is great for use by people of all shapes and sizes, men and women. The realistic veining around the outside is a nice touch, too.
What could be better? The insertable length is not the biggest, so you might be too big for this if you are a man planning to use it. Check beforehand.
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Consumer Engagement
Chosen by 9261 people in the past 30 days
9.5
Customer Feedback
Based on cross-platform reviews
9.1
Brand Reputation
Based on web analytics & content of negative reviews
The Doc Johnson Strappy Hollow Penis Extender is a thick hollow strap on with a circumference of 6 inches. It has an adjustable length of up to 46 inches around the waist, so the vast majority of people will find this very comfortable. The strap is made of nylon and spandex.
This has a firm design, and is very simplistic. This helps with the price tag, and means that this strap on for men represents good value for money, but it also means that it doesn’t have the same realistic feel.
The canal diameter of 1.25 inch is not the biggest, but the large hollow strap on has a 6 inch internal length so it is very versatile for a lot of different users, no matter their size.
It has a splash proof but not waterproof design. Doc Johnson designs use Sil-A-Gel “a material that’s latex-free, odourless, anti-bacterial and non-toxic” meaning they are very kind to skin.
Why is it special? The value for money is definitely there with this model, and the Sil-A-Gel is unlikely to give any negative skin reactions.
What are the flaws? Ideally, the design would be a bit less firm and solid, it can be a little bit painful if you are not used to it.
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Consumer Engagement
Chosen by 8090 people in the past 30 days
9.4
Customer Feedback
Based on cross-platform reviews
8.9
Brand Reputation
Based on web analytics & content of negative reviews
This 7 inch hollow strap on sex toy has a lot to like for men and for women. It has a clever bulb-shaped design which increases the pleasure after penetration. The internal length is up to 5 inches, with an insertable length of 7 inches.
Sold as a set, if you want to, you can replace the actual strap on dildo with another dildo as long as it fits the strap.
This is totally submersible so great for underwater fun, and the silicone material means it is firm, but not too hard.
Like most of the Doc Johnson models on the market, this hollow silicone strap on is an ideal choice for people of all sorts of shapes and sizes, and fits waists up to 48 inches.
Why are we impressed? If you wish, you can switch out the hollow dildo for a different model in the future, but the included strap on is fantastic for couples and great fun for women as the contoured design and bulbed look is perfect for stimulation.
What negatives must you be aware of? Though you can attach different dildo attachments in the future, you are slightly restricted on what you can use. This is also more costly than some others.
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Consumer Engagement
Chosen by 7132 people in the past 30 days
9.3
Customer Feedback
Based on cross-platform reviews
8.9
Brand Reputation
Based on web analytics & content of negative reviews
Whether you want a six inch hollow strap on or an eight inch hollow strap on, a set could be the ideal solution for you, and this from Doc Johnson is ideal for people who want to keep experimenting with more attachments.
A hollow penis strapon can come in many different designs, and this four piece kit includes three different sizes so that you can pick the best for you, depending on how you are feeling or who you are using it with.
Doc Johnson’s wide adjustable waistband is again ideal for people with waists up to 48 inches in size, so it can fit the majority of people with ease.
What makes it stand out? The fact that you can choose between different attachments, and they all have bulbed designs with varying levels, you’re bound to find something you absolutely love.
Which disadvantages must you keep in mind? The smaller hollow strap on attachments are quite narrow, so it might not always be an option to use whichever you want, it depends on your size.
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Consumer Engagement
Chosen by 3337 people in the past 30 days
9.1
Customer Feedback
Based on cross-platform reviews
8.7
Brand Reputation
Based on web analytics & content of negative reviews
The Fetish Fantasy ejaculating strapon is a very realistic hollow strapon, which has the look of a real penis, and even simulates ejaculation. There is a liquid reservoir in there so you can put lube in or other liquids which shoot out when you squeeze the tip.
The canal diameter suits men who are relatively girthy but the internal length is just four inches. This hollow strapon gives a serious extension to men as it ends up with a 7.5 inch insertable length.
It is submersible, making it a very good choice for people who want to use it in the bath or shower. The veiny surface further adds to the realistic feel.
What stands out? The ejaculating feature is a clever addition and can add some more fun and variation to your bedtime enjoyment.
What cons did we manage to find? This might not be the best option if you have a medium sized member, as the inner canal is quite small, so best suited to modest penis sizes. It’s a great hollow strapon for men who want a serious length upgrade.
Are you looking for a huge 10 inch hollow strap on? This is a model that can turn even a normal sized penis into a real giant, with an extension of up to 10 inches.
This hollow jelly strap on is a clever design, and material. It is firm at the tip, so even if you don’t fully fill it you can still deliver the utmost in pleasure. On top of this, it is quite a flexible model, ideal for reaching the pleasure zones a lot of the other hollow strapons can’t.
It is submersible so suitable for use underwater, and it is very realistic in the way it is designed. Even the flesh pink is realistic.
What are its best features? One of the very best things about this hollow strap on is the length. Sometimes, you are just looking for a huge hollow strap on to enhance life for your partner, and this could be the answer for you.
What could be improved? Girthier members may not find that the internal canal is the most comfortable fit.
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Consumer Engagement
Chosen by 2522 people in the past 30 days
8.9
Customer Feedback
Based on cross-platform reviews
8.4
Brand Reputation
Based on web analytics & content of negative reviews
One of the best ways for both parties to get a lot of pleasure out of using a hollow strapon for men is for it to have some extra vibrations to stimulate while you penetrate. The Fetish Fantasy Hollow 10 Function Vibrating Strap-On has been named as the best vibrating hollow strap on and its features and functions definitely justify this.
There are 3 different vibration speeds and seven patterns so you can choose what you enjoy most or ramp things up for more intense pleasure.
The internal length is four inches and this boosts you up to a meatier 7 inches in total. The waistband can be worn by anyone from 30 inches to 52 inches.
As well as having an authentic and realistic size and shape, this model of hollow strap on also comes with USB charging so you don’t have to worry about batteries.
Why is it special? The vibration system is ideal for both. If you are using your hollow strapon as an extender then this can be one of the best ways to ensure you are getting a lot of pleasure out of it as a man. It also feels great for women.
What are the flaws? It isn’t totally submersible due to the fact that it has electronics inside. Also, though it is good that this is USB rechargeable, it can be frustrating if you’ve let it run out of juice then want to use it.
Things to Consider
You’ve read our hollow strap on reviews, now it is time to go through the buying guide to work out which features you should prioritize, and what works for your own specific needs. It could easily be the case that what is ideal for you is not perfect for others. Some women want a six inch hollow strap on, others want a nine inch hollow strap on, it is a matter of personal preference. In our buying guide, we help you to fully understand all the features and functions.
Features to consider before you buy a hollow strap
The following are the most important features for you to ensure that you make the right choice. What is best for one person might not be ideal for someone else. Some features come down to what you would rather use, but others are down to safety and ensuring you get the right fit.
Color and flexibility are definitely things to consider as personal preference. Some people will like flexibility as they feel like it helps them to reach the areas they wouldn’t be able to otherwise. Some people have a favorite color, but this really doesn’t make any difference to the function.
Material is about preference too, some people want a soft hollow strap on, some want something harder. This is also a matter of quality, as only the best materials ensure you steer clear of skin irritation.
The material also plays a part in your buying decision if you are thinking of using your hollow strap on in the bath or shower, as some are able to resist water, like the Fetish Fantasy Unisex Hollow Strap-On Dildo Penis Extender, and others are merely splashproof – fine to use with lube, but generally not safe for using in the shower.
Adjustable length and sizes
This refers to the length around the waist. You will need to ensure you have a strapon that fits you properly around the waist. If it is too tight it can cause pain, too loose and you might not get the penetration you are looking for or the control. The Fetish Fantasy Hollow 10 Function Vibrating Strap-On can fit people with waists up to 52 inches in size.
Dimensions
Dimensions are arguably the most important feature.
The internal length is one of the most important, as the man needs to ensure that he can fit inside, you want to be comfortable and not overly tight in there, but also not too loose so you lose control when bringing pleasure to your partner. This applies to the diameter and circumference, too. Girth needs to be a consideration.
Insertable length is all about the size you end up with. A lot of people who are looking for the best hollow dildos want a penis extension like the Fetish Fantasy Ejaculating Hollow Strap On. This means you will probably want to think about the size that will bring the most pleasure to your partner.
O-rings
The O-ring is what holds the dildo section of the strap on in place. Some o-rings are compatible with other dildos and attachments, a bit like in plumbing, it is a case of choosing the right option for your own needs. If you buy a set or kit like the Doc Johnson strap on kit then you can ensure that you get models which fit the O-ring when you buy dildos or attachments to go with your strap on in the future.
Extra features and warranty
One of the key extra features that we see with hollow strap on models is vibration. A vibrating model can make things a lot more fun and exciting for both you and your partner. For men, it stimulates while you are wearing the strap on. For women, it enhances the feeling.
Warranties for these sorts of products aren’t usually the most generous. They are limited warranties which might mean you have to show that there is something wrong before any successful refund or replacement product is sent.
Price
How much does a hollow strap on cost? There are some very good models on our list for under $50 in price, which is very reasonable. You can possibly get something under $30 if you are looking for the best cheap hollow strapon, and if you want vibrating functionality then you might have to spend a little more, up to $100.
Hollow strap ons should be cleaned after every use both inside and out. Sex toy wipes are often the safest way to do this. Maintaining your strapon can be very simple, depending on the materials. Many of the models on our list can just be cleaned and put away in a box or pouch. Silicone can pick up a lot of lint, so when you are storing anything silicone you should ensure that you put it in its own specific pouch.
We always recommend using lubricant, especially with big and hard hollow strap ons. Ensure that you have a water-based lube as this is less likely to have any negative reactions with your body or the toy itself. Some hollow strapons can even be bought bundled with lube.
Next on the list is the best value, the Fetish Fantasy Unisex Hard-On Hollow Extender is great for a man with a modest size to bring more pleasure to his partner in bed. For the price, it is hard to beat. We’ve given it a rating of 9.7/10.
The Doc Johnson Strappy Hollow Penis Extender is the budget pick. In spite of being cheap, it is a pretty big option and one of the best hollow strap on models on our list for those who value size. We’ve given it a rating of 9.5/10.
