Uniquely designed for bunk beds. Ultra low profile mattress. Designed to maximize the height of the guard rails in bunk and loft beds. Soft organic cotton ticking. Soy based bio-foam. Treated with Nanotex technology, an invisible protective shield that repels spills and resists stains. 10-Year pro-rated warranty. Trundle: 72.50 in. L x 38.50 in. W x 5 in. H. Twin: 75.25 in. L x 38.50 in. W x 5 in. H. Full: 75.25 in. L x 53 in. W x 5 in. H. This convoluted top contoured mattress is designed for optimal weight distribution. A firm mattress at a great value.