【Extra Firm Mattress Topper 】: This bed topper is specially designed as an extra firm level. It's highly suitable for people who suffer from back pain/waist pain caused by insufficient spinal support. If you are looking for an extra firm bed topper that perfectly balances comfort and support, this would be the right one for you!【High Density Foam】: The 3 inch foam mattress topper is made of bamboo charcoal infused foam, which is supportive, does not deform, and gives you the "just right" firm. Bamboo charcoal foam efficiently maintains a fresh environment, with no smell, and makes you sleep more comfortably.【CertiPUR-US Bed Topper】: CertiPUR-US and Oeko-Tex Standard 100 without harmful substances, and the foam and fabric have been independently safety evaluated to comply. Super healthy. This extra firm mattress pad will give you and your family a great night's sleep.【Skin-friendly Cover & Non-Slip】: The foam mattress topper with a breathable and removable cover, is skin-friendly and soft to the touch, allowing you to enjoy a refreshing night's sleep. Non-slip beads and adjustable elastic straps on the cover back ensure a secure fit. Zipper closure for convenient disassembly and washing.