Item Type: Arm Pillow_x000D_ Material: Memory Foam, ABS_x000D_ Product Size: Approx. 28.5 x 36.7cm/11.2 x 14.4in 1Hollow Design: The arm pillow has a humanized design, which adopts a hollow design to ensure that the nap does not press your hands 2Protecting Cervical Spine: The slow rebound pressure pillow can make you sleep on your back comfortably, protecting the cervical spine, and prevent cervical spine ache 3Reducing Waist Pressure: The cuddle pillow can reduce waist pressure for office workers and prevent low back ache caused by long term sitting 4Durable Material: The sleeping pillow has memory foam inner ABS plastic steel frame support, which provides soft support for the head 5Breathable and Comfortable: The pillow with arm hole is made of eco friendly fabric, which is breathable and comfortable, and the mesh lining provides double protection 1 xArmPillow 1 x User Manual