【Multi-Layer Design】Iyee Nature 8 inch cooling-gel memory foam mattress is designed with a three-layer full foam system. Mattress includes 2" gel memory foam, 2" comfort layer and 4" high density base support foam. Design with ergonomics in mind, super supportive. It provides you the ultimate comfort and pampering your sleep. Iyee Nature mattress queen size dimensions: 75"*39"*8"..【Medium Firm Feel】:High-density memory foam is added with gel factor to accelerate air circulation and keep your body cool. It has a slow rebound speed and fits the human body curve at the same time. Low rolling resistance, deep sleep guarantee, like sleeping in the clouds. Iyee Nature queen size mattress provides you medium firm sleep feeling..【Healthy and Skin-Friendly】：Iyee Nature Memory Foam has passed CertiPUR-US and Oeko-Tex Standard 100 Certification, and does not contain Harmful Substances such as Formaldehyde, mercury and other heavy metals. Don’t worry, the soft fabric allows you to sleep well..【Mattress in a box】：Vacuum Compression Technology. Mattresses are rolled into a box by Vacuum Compression, make mattress easy to get into the home. NOTE: After removing the packaging, the mattress needs 48 hours to fully expand to its original state, We suggest that you can try to shake the mattress and pat the surface of mattress gently that will allow the air to enter the sponge. It can help it to regain its normal shape..【Professional Customer Support】: We have a professional production R&D team and a professional customer service team. To provide you with the most cordial after-sales service. If there is any dissatisfaction, please feel free to contact us. But I believe you will fall in love with the mattress of IYEE NATURE. 10 Years Warranty and 30 Days No Reasons Return Policy is the quality guarantee that IYEE NATURE offers you. We hope you have a best shopping experience.