A sticky exposure suit zipper can be a pain, but more importantly if it does not slide smoothly you can cause irreversible damage to the material of the suit from over stretching and stressing. Zipper Lubrication Sticks are for use on all zippers that are exposed to salt water or chlorine. Free up your zipper to give it and your exposure suit long life. Zipper Lubrication Stick is a must for proper preventative maintenance and Save-A-Dive Kit Item