Cool Gel 10.5-inch Certi-Pur Certified Memory Foam Mattress by Dream Bed, Full 10.5-inch mattress with a woven cover contains: 0.125-inch cool gel, 3-inch memory foam, and 7.5-inch support foam; medium-soft feel The layer of cool gel helps disperse body heat away from the body creating a cooler sleeping surface Compatible with most box springs, any adjustable bed base, and platform or bunky boards Foam layers are Certi-Pur certified, containing certified flexible polyurethane foam Mattress in a box: shipped in a 14 inch by 40.1 inch by 14 inch box; 180 day trial period plus 10 Year Full Warranty; Twin-size dimensions: 10.5 inch H x 39 inch W x 75 inch D