Traditional mattress topper weaving workmanship with cooling Bing-Si fiber. 4 elastic stripes on the back wrap around the mattress to stay in the position with helping to circulate excessive heat. Summer mattress toppers were invented in ancient China, which were used to reduce heat during sleep. Nowadays, summer mattress toppers are still being used in Asian society as an alternative for air conditioners. Summer mattress toppers capture heat from the skin and then quickly dissolves into the air. They are made from breathable materials, such as icy silk fiber, wood-pulp fiber, and carbonized bamboo, which gives off a cooler feeling than sleeping on sheets. Extremely moisture-wicking and breathable. Go green with using less air conditioning, plus way cheaper. A natural and healthy way to chill down. Anti-bacterial and anti-mites. Foldable, lightweight, and easy to carry around.