Best Sex Blanket: The Waterproof Throw That Actually Protects Your Bed

A sex blanket is a waterproof throw you lay over the bed to protect your sheets and mattress from lubricant, spills, and everyday moisture, then toss straight in the wash after. The good ones are also called a waterproof sex blanket, and the honest secret is that the best ones aren't sold in an adult store at all: they're pet and furniture-protector throws with a soft face and a hidden waterproof layer, and the Mambe Silky Waterproof Throw is the one we'd point you to first.

What a sex blanket actually does

The job is simple: stop moisture from reaching your mattress. A fitted sheet does nothing once something soaks through it, and a mattress protector under the sheet doesn't help with the part that happens on top. A waterproof throw sits over everything, catches what lands on it, and comes off and goes in the washing machine when you're done. No stripped bed, no midnight sheet change, no stained mattress you can't get your deposit back on.

The reason we like a repurposed pet/furniture throw over most things marketed specifically as a "sex blanket" is simple: the pet-and-incontinence category is mature, competitive, and full of options with real, verified waterproof backing and thousands of genuine reviews, because people buy them to protect furniture from actual daily accidents. That's a higher bar than a lot of novelty-marketed alternatives clear.

The Lab verdict: 4.0/5 A genuinely well-made waterproof throw with a soft, reversible face and real washable convenience. It wasn't purpose-built for this use, so it won't win points for niche marketing, but the actual job (keep moisture off the bed, wash it, repeat) it does very well.

Best for: anyone who wants a discreet, no-explanation-needed waterproof throw that doesn't look out of place folded on a shelf. Check current price on Amazon →

Specs that matter

The two specs that matter most for this use: the waterproof layer needs to be a real internal barrier (not just a water-resistant coating that wears off in the wash), and the size needs to actually cover the area you're protecting. The Medium (70"×70") covers most of a full-size mattress top; go up to Large or the Long/Sofa size if you want it to reach further down the bed or hang over the edges.

Who it's for and who should skip it

Buy it if: you want one straightforward, washable layer of protection that looks like a normal throw blanket and requires zero explanation if a partner, roommate, or houseguest sees it folded on a shelf.

Skip it if: you specifically want something marketed and sized for a designated intimacy area rather than the whole bed. In that case, a dedicated product like the Liberator Fascinator Throw is built exactly for that footprint. Functionally the waterproofing does the same job either way; the difference is framing and price, not performance.

Pros & cons

Pros

• Real, laminated waterproof barrier, not just a water-resistant surface coating
• Reversible and soft on both faces; doesn't feel like plastic sheeting
• Fully machine washable for fast turnaround
• Reads as an ordinary throw blanket; genuinely discreet
• Backed by a large, mature review base from its original pet/furniture-protection market

Cons

• Not purpose-marketed for this use, so sizing guidance is written for couches and pet beds, not this application
• Multiple sizes and colors to choose from means a little more thought at checkout than a single-SKU product
• No dedicated "for sex" packaging or positioning, which some buyers may specifically want

How it compares

A towel is what most people improvise with, and it fails the same way pillows fail as sex furniture: it shifts, it soaks through, and it doesn't actually stop moisture from reaching the mattress underneath. A dedicated intimacy blanket like the Liberator Fascinator Throw does the same core job (waterproof barrier, washable face) in a smaller footprint built specifically for the bed, at a higher price point tied to the niche marketing rather than the materials. A general waterproof throw like the Mambe gets you the same real waterproofing, a size that covers more of the bed, and a lower price, because it's sold at pet-and-furniture-protector volume instead of adult-novelty volume.

Pairs well with the furniture you already own

A waterproof throw isn't a replacement for a good wedge or ramp's own washable cover, it's a second layer that keeps moisture off the foam entirely instead of relying on the cover to catch it. Lay it over a Liberator Wedge or Liberator Ramp and the cover underneath stays cleaner for longer, which matters most on the pieces where the cover is the whole game. It's also the easiest fix for the one real weak spot on a chaise-style piece like the Liberator Esse: the upholstery isn't fully removable the way a wedge's zip-off cover is, so a throw over the top does the protecting instead.

FAQ

What is a sex blanket? A waterproof throw blanket you use during sex to protect your sheets and mattress from lubricant, fluids, and spills. The good ones have a soft fabric face with a hidden waterproof layer underneath, so they feel like a normal blanket but keep moisture from soaking through to the bed.

Do sex blankets actually work? Yes, as long as the waterproof layer is a real internal barrier and not just a surface coating. Check that the listing specifically mentions a waterproof or moisture-barrier layer, not just "stain-resistant" fabric, which is a different and much weaker claim.

Can I just use a regular waterproof mattress protector instead? A mattress protector under the sheet doesn't help with anything that happens on top of the sheet. A waterproof throw sits over everything and catches moisture at the surface, which is the layer that actually needs it.

Is it weird to buy a pet blanket for this? Not at all, and it's a genuinely smart move. Pet and furniture-protector throws are made by companies competing hard on real waterproofing and washability, tested at a scale and price point the adult-novelty category rarely matches, and nobody looking at your order history or a folded blanket on a shelf would think twice about it.

As an Amazon Associate we earn from qualifying purchases. It never changes what you pay or what we recommend. Intended for adults 18+.