WTHN Acupressure Neck Wedge for Tension Relief.The Acupressure Neck Wedge offers quick and effective relief for neck and head tension. Based on the principles of Traditional Chinese Medicine, the wedge activates acupressure points to promote circulation and healthy range of motion. The Wedge also provides cervical extension, keeping the head aligned with the spine to alleviate tension in the neck and back. Say goodbye to tech-neck and other sources of discomfort. Linen exterior, BPA-free stimulators, and a memory foam core.