Luxury Cotton Surface : The upper and bottom shells are made of premium cotton fabric, more breathable and skin friendly compared to polyester. It helps to absorb sweat and dissipate heat, bids farewell to night sweats, and keeps your skin dry and cool. The 500TC pure cotton surface is designed with jacquard satin patterns, making the twin xl size mattress topper more luxurious and elegant. Enjoy perfect deep sleep with our ultra thick cotton mattress topper and welcome a fresh morning. Ultra Thick Filling : The pillow top mattress topper is filled with 1300gsm down alternative fiber, making it thicker and fluffy, allowing you to immerse yourself in the ultimate comfort and effective support. We have added ADVANSA filling materials to help reduce environmental impact and improve product sustainability.