Big Fig’s mattress cover is hand tufted in 16 places. Tufting is a process of compressing the mattress internally and adds long term support and durability. The fabric cover is breathable and helps regulate temperature. The Big Fig mattress cover has ThermoGel quilted into the top over perforated foam so this gives the sleeper another layer of cooling to the mattress surface. The cover itself is 66% polyurethane blend, 30% viscose, and 4% poly/Lycra.