Specifications: Color:Blue Material:35D gel-infused memory foam Dimension of twin size:39" x 75" x 4"(L x W x T) Net weight of twin size:14 lbs Dimension of king size:80" x 76" x 4"(L x W x T) Net weight of king size:31 lbs Dimension of full size:75" x 54" x 4"(L x W x T) Net weight of full size:21 lbs Dimension of queen size:80" x 60" x 4"(L x W x T) Net weight of queen size:24.5 lbs Key Features ● Perforation Design & Gel Infusion: The mattress topper is designed to be ventilated with evenly distributed perforations, promoting air circulation and keeping the mattress always refreshed. In addition, the mattress topper is also gel-infused, which lowers the temperature and keeps you away from hotness, allowing you to sleep more comfortably. ● Extra-Soft & High-Resilience Foam: This mattress topper adopts extra-soft memory foam, making you feel like sleeping on the clouds and ensuring a sound and sweet sleep. And it also features a premium rebound. Thus, the mattress topper is not only comfortable but also supportive for every part of your body, effectively relieving your fatigue and stress. ● Scientific & Ergonomic Design: The mattress topper is CertiPUR-US certified and made of reliable and skin-friendly material. More importantly, the mattress fits well to your body curve, evenly distributing the body pressure. Thus, lying on this mattress, you will feel that the stress and fatigue are quickly relieved. ● Wide Range of Application: The mattress topper is lightweight and can be easily rolled up. Therefore, you can store it in the cabinet or put it in the corner, taking up a small space. Besides, the memory foam mattress topper can be widely applicated in various occasions, such as the bedroom and caravan. ● About Delivery: The mattress topper will be compressed and rolled up for convenient transportation. After arrival, you just need to take it out, unroll it and wait for it to be fully expanded. The mattress topper is 4" thick, and you can choose the right size according to your bed.