Luuf Cooling Comfort Medium 13-inch Hybrid Twin Extra Long Mattress pairs responsive, individually wrapped coils with layers of memory foam and resilient polyurethane for balanced, pressure-relieving support and minimal motion transfer. A breathable cooling cover helps manage sleep temperature while the medium feel accommodates a range of sleeping positions. Ships compressed as a bed in a box for easy setup, is made in the USA, comes with a 10 year warranty, and works with a box spring or platform to provide proper long-term support.