Better Sleep Pillow Gel Fiber Pillow - Patented Arm-Tunnel Design Improves Hand And Arm Circulation - Neck Pain Relief - Perfect Side And Stomach Sleeper Pillow - Bed Pillow, White PROVIDES TWO ARM tunnels with a thick layer of padding over them making room for your arm to burrow under. One tunnel goes down the front the other down the middle, so you can adjust the way you want to at the time. THIS IS A PERFECT configuration for sleeping with your arm under the pillow when sleeping on your side, cuddling and more. THE ERGONOMIC DESIGN of the pillow is great for relieving neck and back pain caused by uncomfortable arm positioning when sleeping. ARM TUNNEL of the better sleep pillow improves circulation to the arm preventing stiffness and numbness. USING THE BETTER sleep pillow means a better night of rest which leads to an improvement in all areas of health from cardiovascular to psychological.