Booby Tubes® are natural, safe, gel-free breast packs made with a 100% organic cotton shell and filled with all-natural flax seed. Use warm or cold, depending on your nursing needs. When heated, Booby Tubes® safely deliver warm, moist heat to tender breasts to encourage milk flow, help prevent clogged ducts, promote let-down & comfort the symptoms of infection. Store Booby Tubes® in the freezer & wear them inside your bra between feedings to help reduce the swelling and tenderness of engorgement. Made in USA.