City Medical compressed mattress, back support, medical firm, spring-free, 10-year warranty. This mattress is designed to be the healthy foundation for stable sleep. Its basic composition of compressed medical sponge provides you with direct and firm support, suitable for heavy weights and the elderly. It is covered with a soft, breathable cotton outer fabric, has a 10-year warranty, and its size is 90 cm × 190 cm with a height of 20 cm.