Earlybird Dual Cool 8" Medium Memory Foam Twin Mattress pairs a cooling cover with polyurethane memory foam to deliver comfort-forward, medium support and targeted pressure relief. The breathable top layer helps dissipate heat while the responsive foam contours to shoulders and hips for more restorative rest. Ships compressed as a bed in a box for easy setup, includes a 10 Year Warranty, and is made in the USA to perform well on a standard foundation or box spring.