Most strap-on guides are written for a partner without a penis wearing a harness and dildo. That's a different product from what most men searching for "strap-ons for men" are actually after. Men's strap-ons are typically hollow — worn over the penis rather than instead of it — and they solve a different set of problems: adding length or girth, or providing support during erectile difficulty, while still allowing the wearer's own sensation and stimulation underneath.

Why "hollow" is the key distinction

A hollow strap-on has an open channel running through the device that the wearer's own penis sits inside during use. That's what separates it from a standard harness-and-dildo strap-on, which is a solid toy strapped onto the body of someone without a penis, or without the ability or desire to use their own. Hollow designs are built specifically so the wearer keeps direct contact and sensation, with the device adding size, rigidity, or both on top.

The main types

Hollow strap-ons

An open sleeve, usually silicone, that the wearer's penis sits inside, held in place with adjustable straps. Used to add length or girth beyond what's naturally there. Available in vibrating and non-vibrating versions — vibrating adds stimulation for the wearer, non-vibrating keeps the focus purely on size and shape.

Erection-assistant strap-ons

Similar hollow-sleeve construction, but designed specifically to support penetration during erectile difficulty — the rigid outer shell provides the firmness while the wearer's own arousal and sensation continue underneath. Worth knowing about even outside of an ongoing diagnosis; occasional erectile difficulty is common and this is a reasonable practical option rather than a medical one.

Standard harness strap-ons

The harness-and-dildo design most existing guides cover — worn by a partner without a penis, or by anyone choosing not to use their own. Not hollow, and not the category most men are looking for when searching specifically for a men's strap-on, but worth knowing it exists as the other main branch of strap-on products.

Fit matters more than size

Adjustable strap systems (usually waist plus one or two leg or thigh straps) are worth prioritising over a fixed harness — bodies vary more than most product listings account for, and a device that shifts during use is uncomfortable for both partners regardless of how good the sizing was on paper. If you're unsure between two sizes, sizing toward the snugger fit is usually the safer call for a hollow design specifically, since a loose sleeve is more likely to slip.

Non-negotiables

• Body-safe materials only. Medical-grade silicone, easy to clean and non-porous — this sits against sensitive skin for the duration of use, so material quality matters more here than in most categories.
• Water-based lubricant, inside and out. Lubricate both the inside of the sleeve (for the wearer's comfort) and the outside (for the partner), and check the material is compatible before using anything other than water-based.
• Wash before and after every use, same as any other toy that contacts the body directly.
• Don't oversize on a first purchase. A dramatic jump in length or girth is more likely to be uncomfortable for a partner and awkward to control for the wearer than a modest increase.

Where to start if you're genuinely unsure

A non-vibrating hollow strap-on in a modest size increase over your own is the lowest-risk first purchase — it lets you get used to the fit and sensation before deciding if a vibrating version or a larger size is worth it. If erectile support rather than size is the actual goal, look specifically for a product described as an erection-assistant design rather than a general hollow strap-on, since the internal shape is usually built differently for that purpose.

Browse the range in Shop Men's Strap Ons. New to strap-ons generally, or shopping for a partner rather than yourself? See Beginner's Guide to Strap-Ons: How to Choose the Right Harness & Dildo.