The Back on Track® P4G Tape is infused with our special mineral composition, Welltex®. The Far Infrared benefits of Welltex® material is specially designed to help improve your body’s natural healing process, promote circulation, improve movement, and prevent muscle tension when applied over your injury or at the site of your chronic pain discomfort. Apply to neck, shoulders, knees, arms, or wherever you’re seeking extra support and relief — ideal for tricky areas. https://botcanada.com/ Sizing charts can be found https://botcanada.com/sizing-charts/