Flip Mattress & 2 Firmness:Simply unzip and flip the cover over and you'll have two firmnesses of mattress to choose from, firm and extra firm mattress.CertiPUR-US CERTIFIED SAFE FOAM & FABRIC - Looking for a safe and healthy material mattress? Then WEUP memory foam mattress is worth your trust! Proudly made in USA, this luxury 12 inch twin xl mattress is crafted with high-quality CertiPUR-US certified memory foam and Oeko-Tex Standard 100 certified mattress cover, Fiberglass Free, no any harmful chemicals and even friendly for pregnant women and babies. COOLER THAN EVER SLEEP ALL NIGHT - Are you disturbed by overheating and sweaty night? The "Ultra Cooling Green Tea Mattress" is here to help hot sleepers improve their sleep quality. It is designed with a 5-layer cooling system, consisting of cool-to-touch ice silk cover+ green tea memory foam + liquid gel coolflex foam + bamboo charcoal foam which helps regulate body temperature and prevents overheating, brings you a a cool sleeping experience. Just enjoy cool sleep throughout all night and embrace a refreshed morning!PRESSURE RELIEF & CONTOUR SUPPORT - You deserve a quality deep sleep. This slow rebound firm memory foam mattress will conform to your body shape perfectly, relieve back pain and pressure points well, generate enough pushback to provide customized support to every inch of your body. It's quite suitable for back sleeper, side sleeper and stomach sleeper. Say Goodbye to back and spine pain.REMOVABLE & WASHABLE ICE SILK COVER - Equipped with a high-quality zipper at the bottom of the mattress for easy removal of the cover. You can simply toss it into the washing machine for a quick and easy clean. It has a stylish black and grey color cover, not easy to get dirty, friendly for children and pets. Our firm memory foam mattress is suitable for adjustable bed frame, floor, platform and all kinds of bed frames & bases.