Bed Bug - Waterproof Mattress Cover - Zippered Mattress Encasement - Twin Size 39 x 75 x 16 Inches Microfiber 100% Bed Bug Proof. Protects the mattress on all 6-sides against allergens, dust mites, bed bugs, bacteria, fluids, perspiration and urine. Extra-soft Polyester knit fabric is cool and comfortable; Breathable waterproof membrane won't trap heat while you sleep. SAMAY is a registered trademark and best-seller of Bedding Products.