InnerSpace 4.5-inch RV Camper Cool Gel Memory Foam Full Size Mattress. Composed of 3-inch high density polyurethane foam, 1-inch of memory foam, 0.5-inch of Cool Gel. Includes a durable, cashmere blend cover. Cool Gel channels heat away from the body and reduces tension on joints and muscles. The mattress also eliminates motion transfer between bed partners. The 75L x 53W x 4.5H Full Size Mattress can also can be used with height-adjustable bed frames, platform beds or slatted frames. Like all InnerSpace mattresses, it ships compression rolled, making it easier to maneuver the mattress through tight spaces and hallways. Simply move the mattress into position, remove the cover, and it will expand to its full and permanent size. Expands to 90% in 30 minutes and 100% within 48 hours. We are so confident you will love our high quality mattress that we offer a 30 Day Sleep Guarantee. If you decide to return the mattress in the first 30 days, there is an easy return method with no hidden restocking or return fees.