Manufactured with hollow fiber that reacts with the heat emitted by our body, warming up and using its heat capacity to warm the air between the fibers, thus creating a layer of warmth that insulates us from the cold. Maximum breathability prevents sweating during rest. Hypoallergenic: made with raw materials that prevent any type of allergy. Antibacterial and anti-mite treatment. Designed to rest in a room with a temperature ranging between 15 and 23 degrees. Easy washing up to 40 degrees. Drying should be done at a low temperature.