. This waterproof, ultra-breathable fitted mattress protector guarantees maximum protection &, with its evaporative resistance, helps eliminate humidity that is normally generated during sleep. Waterproof, ultra-breathable fitted mattress protector in 100% cotton flannelette (210g/m 2), with an ultra-breathable elastomere membrane (total, ultra-comfortable protection that allows humidity to evaporate whilst remaining totally waterproof). This elastomere membrane is 10 times more breathable than classic membranes, guaranteeing you peaceful sleep. It is very soft, discreet & silent, & also offers an excellent barrier against mites & dust.27cm 100% cotton canvas flap (for mattresses up to 27cm in depth). Form-fitting corners. Care advice: washable at 60°C. Meets OEKO-TEX certified standard.