The Zinus gel-infused green tea memory foam mattress consists of three layers that were designed to provide a cooling and relaxing rectangular pad for you to sleep on. The four-inch high density foam at the bottom is thick enough to offer support for the top two layers. The middle layer is made of one-inch comfort foam that allows your body to melt into the mattress, taking the pressure off your muscles and joints in the process. Additional support and comfort comes in the shape of the memory foam on top. This layer chases away unpleasant odors and bacteria thanks to the combination of green tea extract and castor seed oil. The foam was designed to yield and adjust to your shape unlike regular mattresses that are firm and uncomfortable. All three layers are encased in a hypoallergenic fabric knitted jacquard cover. Shipping this 33-pound camp mattress is also made easy thanks to Zinus’s patented technology that allows the mattress to be compressed, rolled and shipped in a box.