Hollow Strap-Ons

Hollow strap-ons slip over the wearer to add length, girth or support—ideal for stamina extension, erectile changes, or strap-on play. Browse 28 options from five to nine inches, in silicone and dual-density designs.
20 products

About Hollow Strap-Ons

Hollow strap-ons are open-ended sleeves that the wearer inserts into, combining their body with the added length and girth of the sleeve. They serve several purposes: extending size for partners who enjoy fuller sensation, providing rigidity for folks experiencing erectile changes, or enabling strap-on play without a separate harness. Most designs include an integrated elastic or adjustable strap-on harness that secures the sleeve in place, so you can use them hands-free during partner play.

Size is the first decision. This collection ranges from five to nine inches in insertable length. If you are new to hollow extensions, consider starting with a six- or seven-inch option like the Fantasy X-Tensions Elite Hollow Silicone Strap-On 6 in. Light or the Fantasy X-Tensions Elite Hollow Silicone Strap-On 7 in. Brown. Longer sleeves such as the Fantasy X-Tensions Elite 9 inch Silicone Hollow Strap on - Light offer more dramatic extension but require more clearance and may feel bulkier. Check the interior diameter if it is listed, to ensure a comfortable fit for the wearer.

Material matters for body safety and sensation. Silicone hollow strap-ons are non-porous, easy to clean, and compatible with water-based lubricant. Some models, like the Fantasy X-Tensions Elite 5 inch Silicone Hollow Strap-on Dual Density - Light, feature dual-density construction: a firmer core for structure and a softer outer layer for comfort. Vibrating versions, such as the Fantasy X-Tensions Elite 7 inch Vibrating Hollow Silicone Strap-on - Light and the Fantasy X-Tensions Elite 8 inch Vibrating Hollow Silicone Strap-on - Brown, add bullet-vibe stimulation for the receiving partner—check whether batteries are included and how the motor is accessed for replacement.

Think about aesthetics and features that suit your play style. Many designs include sculpted details like veins or testicles; the Fetish Fantasy Series 7 in. Hollow Strap-On with Balls Brown/Black and the Fetish Fantasy Series 7 in. Hollow Strap-On with Balls Beige/Black both feature a realistic base with balls. Skin-tone options range from light to brown to black, so you can choose what feels affirming or exciting. Before first use, wash with warm water and mild soap or dedicated toy cleaner, and apply water-based lube generously to both the interior (for the wearer) and exterior (for the receiving partner) to ensure comfort and reduce friction.

Frequently asked

What is a hollow strap-on and who are they for?
A hollow strap-on is an open-ended extension sleeve with an integrated harness. The wearer inserts into the hollow interior, and the sleeve adds length and girth on the outside. They are popular with people experiencing erectile changes, those who want to add size during partner play, or anyone interested in strap-on penetration without removing their own body from the experience.
How do I choose the right size hollow strap-on?
Measure or estimate the additional length and girth you want to provide. This collection offers sleeves from five to nine inches in insertable length. If you are new to extensions, a six- or seven-inch model is a versatile starting point. Also consider the interior diameter for the wearer's comfort—most are designed to accommodate a range, but a snug fit helps the sleeve stay in place.
Are hollow strap-ons body-safe?
Silicone hollow strap-ons are body-safe: non-porous, phthalate-free, and easy to clean with soap and water or toy cleaner. Avoid oil-based lubricants with silicone toys; use water-based lube instead. Always inspect the material and washing instructions on the product page, and replace any toy that shows tears or degradation.
Do I need a separate harness to use a hollow strap-on?
No. The products in this collection include an integrated elastic or adjustable harness strap system, so the sleeve stays secure during penetration. You do not need to purchase a separate strap-on harness, though some users prefer to pair a hollow dildo with a more robust harness for additional support or fit customization.
What is the difference between vibrating and non-vibrating hollow strap-ons?
Vibrating models have a small pocket or chamber (usually near the tip or base) for a removable bullet vibrator, adding stimulation for the receiving partner. Non-vibrating versions rely on texture, size, and movement for sensation. Vibrating options typically cost more and require battery replacement, but they offer an extra dimension of pleasure.
How do I clean and care for a hollow strap-on?
Wash silicone hollow strap-ons with warm water and mild soap or a dedicated toy cleaner after every use. Remove any bullet vibrator before cleaning. Let the sleeve air-dry completely, then store it in a cool, dry place away from direct sunlight. Check the elastic straps periodically for wear, and replace the toy if the silicone becomes sticky, discolored, or torn.