！Note: Be cautious and keep enough distance when opening the mattress from the plastic, as it may smack people. ● Body Conforming & Pressure Reliving--The 7 zoned individual encased coils are positioned at the core of the mattress. On top, multi-layers of CertiPUR-US certified comfort foam are laid in place. This hybrid mattress has a certain amount of spring while also conforming to the body for targeted pressure relief, offering a balanced sleep experience for many individuals. ● Breathable Mattress to Sleep On--The cool cover is made of dual-layered soft knitted fabrics which is super breathable, it can help release moisture and regulate sleeping climate. Airy mesh on side promotes heat dissipation and independently encased coils beneath enhances airflow, which makes the sleeping environment cool and comfortable.You can get rid of HOT on this bed mattress. ● Stronger Edge Support-- This twin xl size mattress has certain advantages over traditional innerspring mattress, such as better motion isolation, less noise, and longer lifespans on average. The edge support of this mattress has been strengthened, sleepers will not roll off or be ejected from the mattress.