Material: Memory Foam (Inner) +Flannel (Cover)[Prevent spondylosis] Sitting for a long time, working or studying in the wrong way, it is easy to cause spine problems. Promotes the elastic effect of the spine, relieves straight neck pain, and helps the normal curve.Removable and washable cover.Great for office, library, home, travel...Cover: Zippered, Machine washable1 x PillowDesign to ease the arm pressure.No Pressure On The Arm.Dimension: 25×23×10cm[Available on both sides] Usually, it takes 1~3 days to get used to this pillow. Since it takes time to match the Contou.r of your neck. Before getting used to it, put your head on the massage surface and stretch it gently. After getting used to it, please put your head on the elastic surface and stretch it fully for use.Office Nap Pillow, Temporary rest head support.Memory Foam, High density slow inner core, pressure to comfortable relaxation.Ergonomic, spine relaxation] The weight of the head is used to wrap the neck. V-shaped concave design fits the neck and provides support. Protruding design effectively relieves the muscles on both sides of the neck. The side curve of the pillow conforms to the physiological curve of the spine and helps the normal curve with continued use.【Innovative Neck Traction Pillow】Ergonomically designed neck traction pillow can be used for 10 minutes a day to neck stiffness and shoulder stiffness and Rela.x the spine. The straight collar is physical relief, and continuous use helps the normal curve. traction pillow specifications: Size: (approx.) length 25 x width 23 x height 10 cm Polyurethane material, soft surface, excellent elasticity and toughness.