The main fabric of this waterproof mattress protector is crystal velvet.Crystal velvet uses large-gloss flat yarn, so its surface gloss is higher. In addition, it uses a new type of modified superfine polyester fiber, the surface is honeycomb-shaped, the fluff is coral-like, and the water absorption is three times that of all-cotton products. And the characteristics of antibacterial and hygienic. At the same time, crystal wool also has warmth retention. https://www.sleepycare.com/water...-thicken-waterproof.html