Glideaway Blue Chill Charcoal Memory Foam with Cool Response Gel Layer Charcoal absorbs body perspiration and neutralizes humidity within the pillow providing management of odor and bacteria growth. Memory foam is naturally resistant to allergens. A layer of cool performance gel and Cooling material of cover helps keep the body at an optimum sleeping temperature with moisture management and wicking properties. Advanced Memory Foam molds to the contours of your head and neck to give you proper support. Reversible design allows sleeper to choose to sleep on Advanced Memory foam alone or in addition to layer of cool response gel. 1 Year Warranty