The Boyd Sleep 12 inch Cooling Gel Memory Foam Mattress is designed to keep you cool, comfortable and asleep all night long. All Boyd Sleep mattresses are 100% fiberglass free and glass fiber free, featuring natural cotton for healthy sleep. High-density Reflexa Foam at the base provides lasting support and durability. Advanced Cooling Air Flow Gel Memory Foam is designed with large self-ventilated openings in the cell structure to promote more air circulation than a traditional memory foam mattresses. High-performance Engineered Latex Foam contours to your body and provides superior lumbar support. Plus, the removable, washable cover ensures a clean and hygienic sleep surface night after night. Multi-layer design provides superior comfort and support Advanced Cooling Air Flow Gel Memory Foam Engineered Latex Foam High-density Reflexa Foam base Air Flow structure Medium plush feel Removable, washable cover is made with natural cotton 100% fiberglass free 10-Year Limited WarrantyNote: Allow mattress to expand flat for 24-48 hours before use.