With its heat sensitive structure, takes the shape of head and neck regions and adapts to the body. Helps resting the shoulder and neck muscles with its shape fitting the spine structure. Has a special cover that can be washed at 40 C Product Features Poly&Cotton knitted fabric. Produced by open-cell technology. Keeps the vertebrae straight and keeps them in the correct line. 53 DNS visco used. Contains no hazardous CFC (chloro fluoro carbon) material. Product size: 50x30x6,5/10,5 cm Washing Recommendations Do not bleach. Do not machine dry. Do not dry clean. Only the cover washable at 40 degrees.