LANGRIA 3-Inch Twin Mattress Toppers Memory Foam Bed Topper CertiPUR-US Certified with Removable Zippered Hypoallergenic Bamboo Cover and Non Slip Bottom Instant Upgrade: 3-inch thick CertiPUR-US certified memory foam not only adds a layer of comfort to your mattress, its also free from harmful chemicals with less than 0.5 parts per million VOC emission Extra Comfort: our Twin memory foam topper is 39  75  3 inches and isolates almost all motion (perfect for light sleepers), conforms to the shape of your body, and stimulates pressure points to help pain relief Hypoallergenic Cover: the outer bamboo cover is 100% antibacterial and hypoallergenic, moisture wicking, and removable, ensuring the topper always stays clean, cool and fresh Non-Slip Bottom: the topper features an inner cover of polyester knit fabric and the bottom features a non-slip fabric, which keeps the topper in place when it is on your mattress Easy to Store: the topper can be rolled up and stored when not in use or in need, making it great for guest rooms