Cool, comfortable and supportive for all sleepers. Our medium-firm, 8-Inch Twin Memory Foam Mattresses feature our cozy three-layer design that’s perfect for kids and teens. At 8 inches tall, the unique compact comfort construction provides the perfect height for Bunks and Lofts while matching the feel and comfort of a thicker mattress. The plush and breathable covers, made with organic cotton, are easy to remove and machine washable.