Surface: 55% Polyester + 45% Rayon Made from Bamboo OEKO CERTIFIED-BEST QUALITY & TRUST WORTHY: GRT waterproof crib mattress protector rayon made from bamboo is certified to STANDARD 100 by OEKO-TEX, which is the most authoritative and influential textile eco-label in the world, so our toddler cooling mattress protector does not contain any harmful substances or chemicals, keeping you and…