Bamboo Blend Zippered Mattress Pad Topper Enclosure, 2 - 4 Inch with Non-Skid Bottom (Queen) Polyester Knit Bamboo for Greater Breathability, Coolness Blend of 40% Bamboo, 60% Polyester; Non-Skid Bottom Fits 2 to 4 Inch Toppers, Zippered for Ease of Use Machine Washable & Dryable Protects Your New Mattress Topper