Medium-Firm Comfort: Designed to cradle your curves with multiple levels of comfort, this twin size mattress topper helps you sleep deeper and wake up refreshed. Dual-Layer Design: The 4” mattress topper consists of gel memory foam and bamboo charcoal supportive foam. Together they can offer you pressure relief and added support. Choose Your Plush: The memory foam topper comes in 2, 3, 4-inch profiles. Feel free to select a perfect height that suits your preferred firmness.