iSleep Oxford Series sheet is made from 100% pure cotton which is a natural touch and creates an unforgettable sleeping experience. These cotton sheets feel cool against your skin. Cotton fabric has the ability to absorb the extra heat, and moisture from our body, and thus enables us to uninterrupted sleep. The fitted sheet fit up to 14 inches mattress. The material is breathable and durable. It is hypoallergenic and anti-dust mites.