HONGGE 12 inch Twin Size medium gel memory foam mattress you with a wonderful sleeping harbor. The free air flow among 12 inch foam and the gel particle inside can keep you cool all night.Unique noise reduction memory foam allows you to relax all night without interference. The outer cover has a humanized removable and washable design to keep the mattress clean.Fantastic boxed mattress magic, 12 inch twin size medium foam mattress is compressed and packaged in a box for shipping.It can easily pass through narrow corridors and stairs. The twin size mattress fit all frames, such as box spring, floor, slatted base, flat platform or adjustable bed, hospital bed.