What are Strap-Ons?

A strap-on is a wearable sex toy that typically combines a harness with a dildo. The harness fits around the wearer’s hips and thighs and holds the dildo in place, allowing the wearer to control it with their body and hips while keeping their hands free.

Most strap-on harnesses have three main components:

• Harness: The adjustable straps secure the harness around the body and hold the dildo in position.
• O-ring: The ring at the front of the harness holds the dildo in place. The ring size determines which dildo bases are compatible with the harness.
• Dildo: The dildo slides through the O-ring and needs a flared base that is wider than the opening so it stays securely in place.

Strap-on harnesses come in different styles, materials, and designs. Some use a traditional O-ring and interchangeable dildos, while others have a dildo permanently attached to the harness. Strapless designs are another option and are worn differently from traditional harnesses.

One important thing to know is that a traditional strap-on does not transmit the same sensations to the wearer that it provides to the receiving partner. The wearer can feel the pressure and movement of the harness, but the dildo itself does not provide direct sensation. Choosing the right fit, position, and style can make the experience more comfortable and enjoyable for everyone involved.

A good fit keeps the harness secure, comfortable, and in the right position during use. Before using it with a partner, try it on by yourself so you can adjust the straps and get familiar with how it sits on your body.

The exact steps vary by harness style, but the basic process is the same: put on the harness, adjust the waist and thigh straps, position the O-ring, and make sure everything stays securely in place without feeling too tight. Take a few minutes to check the fit before adding a dildo or using the harness with a partner.

1. Loosen every strap, step into the harness, and settle the waist band where it sits comfortably on your hips rather than your waistline.

2. Pass the dildo through the O-ring from the front so the flared base rests flat against the back of the ring, then tug the shaft gently to confirm the base is holding.

3. Tighten the waist strap first, then the thigh straps, working in small increments so the weight stays balanced across both legs.

4. Walk around, sit down, and move your hips the way you actually would. The assembly should move with you instead of sliding, and you should be able to slide a finger under any strap without it digging in.

5. Adjust once more with lube on your hands if you want a realistic check, since a slick grip is harder to work with than a dry one.

Aim for a snug, secure fit without pinching or digging into your skin. If the harness slips or the straps leave deep marks, readjust the waist and thigh straps until it stays comfortably in place.

Expect to adjust it again after a few minutes of moving around, and again the next time you wear it. Small corrections are ordinary, not a sign that you chose the wrong harness.

Once the fit feels right, start somewhere familiar. A position you already know well leaves the harness as the only new thing to think about, which is much easier than learning a new angle and a new piece of gear in the same evening.

Strap-ons come in several different designs, and each style offers a different fit and feel. Understanding the main types makes it easier to compare your options and choose the one that suits you best.

Harness strap-ons. A harness-based strap-on pairs a wearable harness with a separate dildo that fits through the front O-ring. Because the harness and dildo are separate, you can change the dildo without replacing the harness, giving you more flexibility to choose different sizes, shapes, and materials. Harnesses come in a range of styles, including traditional strap designs with a waist strap and two thigh straps, underwear and panty styles, corset and lace styles, thigh-mounted designs, and matched sets that include both a harness and a compatible dildo.

Hollow strap-ons. A hollow strap-on has a hollow, insertable sleeve designed to fit over the wearer’s anatomy. Unlike a traditional strap-on that holds a separate dildo in an O-ring, the hollow design incorporates the sleeve into the toy itself. This style can provide a different fit and wearing experience from a traditional harness-based strap-on. When comparing designs, consider how the toy fits, how it stays in place, and which style feels most comfortable for you.

Strapless strap-ons. A strapless strap-on skips the harness entirely. An internal bulb is held in place by the wearer's pelvic floor muscles while the external shaft does the rest, so there are no straps to buckle and the two of you stay in direct contact the whole time.

Choose The Right Material

Once you know which strap-on design you want, the material is another important factor to consider, especially for toys that are used internally. Non-porous materials have surfaces that don't absorb fluids and are generally easier to clean thoroughly. A peer-reviewed review of sexual device safety identifies silicone, hard plastic, glass, and stainless steel as suitable non-porous materials for insertable toys.

If you're unsure what a toy is made from, using a condom over it can provide an additional barrier. Condoms can also make sharing a toy between partners easier, since you can change the condom between uses rather than stopping to clean the toy.

Talk Before You Start

Before using a strap-on with a partner, talk about what you both want to try, what you want to avoid, and how you'll communicate during sex. Agree on a simple way to say “slow down” or “stop,” and decide who will wear the harness.

During use, check in with the receiving partner about pace, pressure, position, and comfort. Because the wearer cannot directly feel the dildo's movement inside their partner, clear feedback is especially important. Specific requests such as “slower,” “more pressure,” or “a little higher” can make it easier to adjust.

Use the Right Lube

Lubrication helps reduce friction and can make penetration more comfortable. Water-based lube is a versatile choice because it is compatible with latex condoms and most sex-toy materials. Avoid oil-based products such as petroleum jelly or body lotion with latex condoms, as they can weaken the material. If you're using a silicone toy, check the manufacturer's instructions before choosing a silicone-based lubricant. When in doubt, water-based lube is the simplest option.

Take Your Time With Anal Play

Anal tissue does not produce its own lubrication, so using plenty of lube and reapplying it as needed is particularly important for anal play. A condom or other suitable barrier can provide additional protection, and using a fresh condom when switching between partners or body areas can help prevent the transfer of bacteria. Start slowly and let the receiving partner control the pace and depth. If anything feels painful or uncomfortable, stop and adjust rather than trying to push through it.

Choose a Securely Fitting Toy

For any strap-on used for penetration, make sure the dildo has a wide, flared base that keeps it from slipping completely inside the body. With a traditional harness, the O-ring also helps hold the dildo in place, but the dildo's base should still be appropriately sized for the harness. A properly fitted toy should stay securely attached during use. If you're using a strapless or hollow design, follow the manufacturer's instructions carefully, since these designs may secure the toy differently from a traditional harness.

"Can the person wearing it feel anything?" Not from the dildo itself, but plenty from everything else. You feel the base pressing against you, the straps shifting, your partner's body, and the rhythm you're setting. Some designs add a vibrating element or an internal piece for the wearer, and strapless styles involve the wearer's body directly, so what the wearer feels varies quite a bit from one design to the next.

"Will it slip?" A properly fitted harness moves with your hips rather than sliding on them. When one does slip, it usually traces back to straps left loose at the thighs or a dildo base that isn't seated flat behind the ring. Both are five-second fixes once you know to check.

"Does it hurt?" It shouldn't. Pain is a signal to slow down, add lube, or change the angle rather than something to push through. Starting with a smaller toy can help you figure out what feels comfortable before moving to a larger size.

"Is it only for certain people?" No. Anyone can wear a strap-on, and anyone can be the receiving partner. There’s no right or wrong way to use one; what matters is that everyone involved wants to try it and feels comfortable with the experience.

"Is a strap-on safe?" Strap-ons can be used safely when the toy is made from a suitable material, fits securely, and is used with enough lubricant. Choose a dildo with a wide, flared base, and consider using a condom or other barrier, especially when sharing a toy or moving it between different body areas.

Cleaning is also important. Wash non-porous toys according to the manufacturer's care instructions and let them dry completely before storing them. Clean the toy before using it on another person or moving it from one body area to another. If you're unsure whether a toy can be thoroughly cleaned, using a fresh condom over it provides an additional barrier.

For the harness, follow the manufacturer's cleaning and care instructions, since materials such as fabric, leather, and synthetic materials can have different requirements.

Ready to find the right strap-on? Browse Adam & Eve's selection of strap-on sex toys to compare harness-based, hollow, and strapless designs. You can also shop harnesses separately if you'd prefer to choose your own compatible dildo.

Don't forget the essentials. A quality water-based lube is a versatile choice for use with condoms and most sex toys, while a dedicated toy cleaner keeps everything fresh for next time.