Machine Washable Cover: Polyester blend, 40% Viscose Standard Sized 24 x16 x 1.75 Inches THINNEST PILLOW ON THE MARKET - ONLY 1.75-INCHES HIGH: You asked for thinner, and we listened. WHO IS THIS FOR? Not for everybody. This pillow is designed for those who typically sleep with "no pillow" or for those who require minimal head elevation off the mattress. This may apply to some back sleepers or stomach sleepers. Our CertiPUR-US certified gel memory foam offers medium support with very low loft. This can improve breathing, reduce snoring, and alleviate pain on your shoulders, neck, and back. Ventilation holes increase air circulation to help keep you cool all night long. This pillow comes with a zippered, removeable cover. Memory foam contains NO: PBDEs, TDCPP or TCEP (”Tris”) flame retardants, Mercury, lead, and other heavy metals, Formaldehyde. NEW opened package; Teared packaging; after letting it fully expand, I found it to be too thin. Never used. Smoke free home