Waterproof body pillow covers solve a problem that many body pillow owners do not think about until it is too late. Body pillows sit against your torso, arms, and legs for eight hours every night, absorbing more sweat and body moisture than any standard pillow. Without waterproof protection, that moisture soaks into the fill, creating the perfect environment for mould, bacteria, and permanent staining. Here is why a waterproof cover is worth adding to your body pillow setup.
Why Body Pillows Need Waterproof Protection More Than Standard Pillows
A standard bed pillow contacts your head and face — roughly 600 square centimetres of skin. A full-length body pillow contacts your head, neck, chest, arms, hips, and legs — easily three to four times more skin surface area. More skin means more sweat transfer, more sebum (skin oil) transfer, and more dead skin cells deposited onto the pillow surface every night.
Shaped body pillows like U-shaped and C-shaped designs wrap around the sleeper, creating enclosed spaces where warm air and moisture concentrate. These trapped pockets of humidity accelerate moisture absorption into the pillow fill far faster than an open, exposed pillow surface.
Most body pillow fills — polyester fibre, memory foam, microbeads — absorb moisture to varying degrees. Once moisture penetrates the fill, it creates conditions for mould and bacterial growth that produce musty odours and potential health concerns. Body pillows are also more difficult and expensive to replace than standard pillows, making protection a better investment.
Types of Waterproof Body Pillow Covers
TPU Membrane Covers
Thermoplastic polyurethane (TPU) membrane covers use a thin, flexible film bonded to a fabric surface. TPU blocks all liquid transfer while allowing water vapour to pass through, meaning sweat in vapour form can escape but liquid sweat cannot penetrate. Modern TPU membranes are thin enough that you cannot feel them through the fabric — the cover feels like a normal pillowcase.
TPU is the current industry standard for waterproof bedding. The membrane is quiet (no rustling or crinkling sounds), breathable enough for comfortable sleep, and durable enough to survive hundreds of wash cycles without degrading. For body pillows specifically, TPU covers are the top recommendation.
PU (Polyurethane) Laminate Covers
Older-style polyurethane laminate covers use a thicker waterproof layer than TPU. PU laminate provides reliable waterproofing but breathes less well and can feel slightly plasticky or warm against the skin. Some PU covers produce a faint crinkling sound when you move. If budget is the primary concern, PU laminate covers cost less than TPU while still blocking moisture effectively.
Water-Resistant (Non-Membrane) Covers
Some body pillow covers use tightly woven fabric treated with a DWR (durable water repellent) finish rather than a membrane. These covers repel splashes and light moisture but do not block sustained exposure. Sweat that pools against the cover for several hours overnight will eventually soak through. Water-resistant covers offer a step up from unprotected fabric but do not match membrane-based covers for genuine protection.
Momcozy U-Shaped Pregnancy Pillow
Fabric Options for the Outer Layer
The waterproof membrane sits underneath the outer fabric, so the surface you actually touch can be any standard pillow cover material.
Cotton terry with TPU backing is the most common combination. The cotton terry surface absorbs surface moisture for a dry feel while the TPU underneath prevents anything from reaching the pillow fill. Comfortable, affordable, and widely available in body pillow sizes.
Bamboo rayon with TPU backing adds superior moisture wicking to the waterproof barrier. Sweat is pulled away from your skin into the bamboo fabric and evaporated before it can pool on the surface. An excellent choice for hot sleepers and pregnancy pillow users who experience elevated body temperature.
Tencel (lyocell) with TPU backing offers the smoothest surface feel combined with excellent moisture management and waterproofing. The premium choice for sleepers who want maximum comfort alongside protection.
Sizing for Body Pillows
Waterproof body pillow covers need to fit snugly. A loose cover allows moisture to pool in fabric folds rather than being absorbed and managed properly. Measure your body pillow’s length, width, and girth before purchasing.
For shaped pregnancy pillows, brand-specific waterproof covers (if available) provide the best fit. Generic waterproof covers are widely available for standard rectangular body pillows but much harder to find for U-shaped, C-shaped, and J-shaped designs. If a waterproof shaped cover is unavailable, layering a standard non-waterproof shaped cover over a waterproof mattress protector cut to size can work as a temporary solution.
Care and Maintenance
Wash waterproof body pillow covers every two to four weeks at 40 to 60 degrees Celsius on a gentle cycle. Avoid bleach, which degrades both TPU and PU membranes over time. Skip fabric softener — the waxy coating it leaves on fabric can block the membrane’s vapour transfer ability, making the cover feel hotter and clammier.
Tumble dry on low heat. High heat can damage waterproof membranes, causing them to crack, peel, or lose effectiveness. Air drying is the safest option and extends membrane life significantly. Our pillow care and washing guide covers detailed instructions for waterproof bedding.
Momcozy U-Shaped Pregnancy Pillow
Testing Your Cover
Waterproof membranes degrade over time. Test your cover every three to six months by laying it flat, pouring a small amount of water onto the outer surface, and checking after five minutes whether any moisture has passed through to the underside. If moisture penetrates, the membrane has failed and the cover needs replacing. Most quality TPU covers last two to three years before membrane degradation becomes an issue.
Browse our body pillow case reviews for waterproof and standard cover options in every size and shape.
Teresa created SaunaReviewer.com after discovering how transformative sauna therapy was in her own life. Today, she helps thousands of readers find reliable, honest information about saunas, accessories, and at-home wellness. Her mission is to make choosing the right sauna easier, clearer, and stress-free.
