• Ideal for those who have sweating problems in the head and neck area with its cooling gel surface, the viscoelastic pillow has a special gel coating produced with 3D molecular technology. Only the cover is washed. Orthopedic Does not feel wet. Viscoelastic filling creates an ergonomic structure. Feeling of coolness and freshness. Helps prevent sweating problems in the head and neck area. Inner filling: 100% viscoelastic Outer Fabric : 100% spandex Height: Low Hardness: Medium