【Natural Bamboo Charcoal & Gel Infused】Sleepmax bamboo charcoal memory foam matatress topper infuses with natural bamboo charcoal and gel particles, which can significantly reduce the odor caused by night sweat or long time usage; with the ventilated design, it's extremely efficient in maintaining a clean and fresh sleeping environment..【Upgraded 38D Durable Mattress Topper】 The foam mattress topper adpots latest 38D high quality memory foam, which is made to be super durable and can prolong your mattress life to the max. It can instantly drecrease the discomfort causing by an old bed or aging mattress without an expensive cost. It comes in 2/3/4 inches, just pick your prefered level of comfort..【Balanced Contouring Support】This 3-inch memory foam topper utilizes a 2-layer design, includes 2" memory foam and 1" high density supportive foam, shapes your body contouring naturally while adds more support and durability..【Washable Cover & Non-slip Strap】All Sleepmax foam toppers are CertiPUR-US Certified. It comes with a premium knitted zipper cover with soft and skin-friendly material, engineered with the latest weaving technology to offer you the softest touch and luxurious feel. Non-slip bottom and elastic strap helps to stay put. You can freely lie on the bed without frequent adjustment..【Great Gift Idea & Multi-Usage】 Why not take this memory foam bed topper as a great gift choice for yourself, family or friends? It's a perfect complement for one's bedroom, living room, guest room, futon bed or college dorms. Simply unroll it and allow it to fully expand for 48-72 hours. (Better keep the room temperature over 73℉(23℃) in winter).King Mattress Topper: 76" x 80"