The Ultrapak cord is made of 100% cotton, knitted into thousands of tiny loops forming long interlocking chains. This unique knitted design exerts a gentle continuous outward force following placement as knitted loops seek to open. Ultrapak E is impregnated with racemic epinephrine hydrochloride. Product Features - Knitted cord design, packs quickly and easily - Bends and stays in place when packed, Each bottle contains 8feet of cord