Understanding Firmness in Foam Firmness doesn't mean rigid, like sleeping on the floor. Instead, it refers to a supportive surface that gently conforms to your body. The key to foam is elasticity. foam toppers provide excellent support through elastic deformation, allowing your body to sink in just enough for comfort. ? ENHANCED SUPPORT The 3-inch mattress topper is thoughtfully engineered with a firm density that adapts to the contours of your body. It¡¯s an ideal choice for back and stomach sleepers who prefer added stability and firmness (please note, individual preferences may vary). ? TWO-LAYER DESIGN Our premium foam topper features a dual-layer construction: a plush top layer of memory foam paired with a supportive firm foam base. This combination offers comforting firmness, helps with spine alignment, and relieves pressure points for a more restful sleep. ? EASY MAINTENANCE The mattress topper comes with a removable, washable cover featuring an elegant line pattern design. Four adjustable corner straps ensure a snug, secure fit on your mattress. ? BEFORE FIRST USE For optimal performance, we recommend letting your bed topper air out in a well-ventilated room for 8-12 hours to fully expand.Memory foam mattress toppers are CertiPUR-US and OEKO-TEX certified, guaranteeing top-quality materials that meet or exceed US safety and environmental standards.