Made of hollow fibre material that reacts to the heat emitted by the body and uses its thermal capacity to heat the air between the fibres and form a thermal insulation that protects us from the cold. Made from raw materials that have undergone an antibacterial and anti-dust mite treatment that prevents allergies. Maximum breathability to avoid sweating during sleep. This duvet is ideal for autumn and winter as well as for rooms with medium or cold temperatures. Easily washable up to 30ºC. Tumble dry at low temperature recommended. Made in Spain, has the Oeko-Tex certificate, which guarantees production without harmful substances.