The Sleep Philosophy 4 in. Memory Foam Topper blends 2 in. cooling gel-infused memory foam (2.5 lb. density for ideal temp control) and a 2 in. high-density support layer, instantly easing pressure points, relaxing muscles, and turning your bed into a cozy haven. It's Oeko-Tex Certified (no harmful chemicals), naturally antimicrobial and hypoallergenic, plus it comes with a 3 M Scotchgard zippered cover-stain/moisture-resistant, anti-slip, and machine-washable for hassle-free care. Slightly oversized to cover full mattresses end-to-end, it's compressed in one easy-to-ship box; just unbox, unroll, and watch it expand to full shape in 72 hours-luxury sleep at a fraction of a new mattress price. Material: Polyester.