Strap-On Kits for Trans Masc Folks: What's Included and How to Choose

This one's for anyone who's ready to strap in - whether you're topping a partner, exploring pegging, or just want your gear to actually fit together instead of being a Frankenstein setup of three different brands. If the words "o-ring size" already make your eyes glaze over, you're exactly who this guide is for.

What's actually in a strap-on kit?

Most kits bundle a harness, a dildo (sometimes called a strap-on dong or pack and play piece), and the connecting hardware - usually an o-ring that threads through the harness and the base of the dildo. Some kits add a second o-ring size, a storage pouch, or a travel case. The point of buying it as a kit instead of piecing it together is simple: the dildo's base is guaranteed to fit the harness's o-ring, so you're not stuck returning something because the sizing doesn't match.

How do I know which harness style is right for me?

It comes down to how you want it to feel and how long you'll be wearing it. Underwear-style harnesses (briefs or boxer-brief cut) feel the most like, well, underwear - comfortable for extended wear and great if you want your gear to disappear under clothes. Adjustable strap harnesses (think leather or nylon with buckles) give you a more customizable, secure fit and a look a lot of folks find more affirming on its own. Our Shilo pairs beautifully with either style if you want a dual-density dong that also doubles as a pack and play piece. Read our full strap-on harness guide for the deeper breakdown by body type and use case.

What size dildo should I start with?

Smaller than you think, honestly. A lot of first-timers overestimate what feels good in practice. Something in the 5-6 inch range with a moderate width is the sweet spot for most people's first kit - easy to control, comfortable for your partner, and not intimidating to wear. You can always size up once you know what you and your partner actually like. If you also want your gear to work as a packer during the day, look at Jack, our 2-in-1 stroker and packer that transitions into strap-on play with the right harness.

Do I need to buy the harness and dildo together?

Not always, but it's the easiest way to avoid a sizing headache your first time out. O-rings come in a handful of standard sizes, and most harnesses accept more than one - but if you're new to this, a matched kit takes that guesswork off your plate completely. Once you know your preferred o-ring size, you can mix and match future pieces with confidence.

What if my partner and I want different things out of it?

This is genuinely one of the best parts of building a kit - you're not locked into one setup. A lot of couples keep two dildos in rotation (one smaller for warm-up or everyday use, one for when you want more) with the same harness. Browse our full strap-on kits collection to see bundles built around exactly this kind of flexibility, or shop harnesses on their own if you already have a dildo you love.

Real talk: there's no wrong way to build your kit, and there's no prize for jumping straight to the biggest, most elaborate setup. Start with something comfortable, get a feel for what works for your body and your partner, and upgrade from there. Half the fun is figuring it out as you go - that's normal, and it's part of the process, not a sign you're doing it wrong.

What's the difference between a strap-on kit and buying pieces separately? A kit guarantees the harness and dildo are sized to fit each other out of the box, so there's no guesswork on o-ring compatibility.

What size should a beginner start with? Most first-timers do best with a 5-6 inch dildo and a moderate width - comfortable, controllable, and easy to build confidence with.

Underwear-style or strap harness - which is better? Underwear-style disappears under clothes and suits longer wear; strap harnesses offer a more custom, secure fit and a look many find more affirming on its own. Both work well - it's personal preference.

Can I use one harness with multiple dildos? Yes, as long as they share a compatible o-ring size, which is exactly why a lot of people build out a small rotation over time instead of buying one piece.

Do strap-on kits work for pegging? Absolutely - the same harness-and-dildo setup is what most pegging guides recommend starting with, matched to comfort and control over size.

Why trust us: NYTC has been making gender-affirming gear since 2012 - 14 years of designing this stuff by and for our own community. Anything you want to ask, the question box is here — anonymous if that is easier.

This isn't medical advice - just guidance from people who've been where you are. Ready to build your kit? Shop strap-on kits and find your setup.