LMX1353 Features: * 4"" Foam mattress extension fills the gap when using an 80"" mattress on an 84"" bed * Hook and loop fastener secures extension to mattress to reduce shifting * Soft and durable zippered Chemsafe cover is bacteria resistant, flame retardant, fluid resistant, anti-static, non-allergenic, stain resistant, and easy to clean * Latex free Dimensions: * Dimensions: 4"" H x 6"" W x 35"" D