The Cotton Mattress Protector by REM-fit keeps your bed clean and comfortable for a good night’s sleep. The soft sleep surface is gentle to your skin and can be slept on directly as a bed sheet. The miracle membrane underneath the cotton sleep surface creates an anti-allergen barrier to help the mattress last longer and stay clean and allows air to freely pass through which prevents heat build-up. It also acts as a barrier against sweat, accidental spills and allergens from entering your mattress.