Safe, gel-free breast packs for nursing mothers 100% organic cotton shell filled with all-natural flax seed Use warm or cold, depending on your breastfeeding needs Warm to help encourage milk flow, help prevent clogged ducts, promote let-down, cold to help reduce swelling and tenderness of engorgement and during weaning Two Booby Tubes per box, one for each side Booby Tubes Gel-free Breast Packs for Breastfeeding. Organic Cotton Shell and Filled with Natural Flax Seed. Booby Tubes are natural, gel-free breast packs made with a 100% organic cotton shell, filled with all-natural flax seed. When heated, Booby Tubes deliver warm, moist heat; when stored in the freezer, they offer cooling comfort. The unique gel-free construction was designed with extra care to help reduce the risk of burns. You get two Booby Tubes per box, one for each…well, boob.