Elastic,memory Foam,bamboo Bamboo Charcoal Infused: The Twin size bamboo charcoal mattress topper helps odors free, regulate temperature and absorb moisture. It’s extremely efficient in maintaining the freshness of your bed topper. Removable Non-Slip Cover: The skin-friendly cover with zipper is easy to remove and care hence it extends the using time of mattress topper. 4 elastic straps on corners keep the bed topper in place.