Top fabric:135grams 100% cottonflannel

Backing :0.02mm 25grams white 100%polyurethane TPU

Around skirtfabric : 80grams100%polyester knitting interlock fabric with elastic aroundsides.

Speciality: waterproof, bugs proof, moisture-penetrability,permeability.

It is a goodway, to protect us from the bugs and the mites from themattress.