1. Creative Design Ergonomic design arched pillow, effective fit to the human cervical vertebrae, soft support, can relieve Neck, Shoulder and Back Pain, improve cervical vertebra comfort, improves blood circulation for side sleepers, the pillow feels softer and firmer in cold temperatures. The height of the tunnel is 2.8inch. 2. Perfect Support Internal Patented ABS plastic steel frame provides support, with a perfect curved shape design, this pillow can perfectly place the arm under the pillow to prevent the arm from being pressed during the sleeping journey and causing pain and improve sleep quality for side sleepers. 3. Material The outer surface is made from a soft memory foam fabric that recovers its shape after use. The pillow also has a removable ice silk cover that is easy to wash, comfortable and durable, bringing ultimate relaxation. (Since the interior is ABS Frame, the pillow will not be as soft as ordinary memory foam pillows, and you may find it a bit hard) 4. Best Choice for Couples When a couple is sleeping, use this pillow to hug, don't worry about arm numbness. It is the ideal sleeping solution for persons napping in a seated position during the office lunch break, at school, while traveling, or in another environment