GIVE YOURSELF A BREAK, RELIEVE PAIN FROM HEELS, PREVENT RUBBING AND BLISTERS. 3 Type Invisible Anti-abrasion Foot Stick Type 1: Sponge Foot stick, adhere to the heel of your shoes to prevent rubbing and blisters. Type 2: Upgrade Invisible+Sponge Foot Stick, soft sponge part for care and repair blisters, while sticking on slip-on shoes! Type 3: Ultra-thin transparent self-adhesive, Waterproof, invisible & transparent! Main Features Specification