These bedbug-proof quilted mattress encasements are made with an advanced 2-IN-1 solution, a mattress pad, and a protector with a built-in pad, zipper, and velcro. The top fabric is 80 GSM microfiber, filling 140 GSM & back is 40 GSM non-woven+TPU 0.02. All other sides are 100% Polyester. The All-in-one design keeps your mattress odor free, protecting it from spills, moisture & stains. Machine washable.