Engo blister prevention patches provide long lasting protection against blister-causing friction / rubbing and are guaranteed to prevent and relieve hot spots, pressure sores, blisters and calluses. The are manufactured with a durable adhesive to prevent patch migration typically experienced with traditional blister products and eliminate the need for pre-taping, messy creams and powders ENGO® Blister Prevention Patches are guaranteed to keep you blister-free or your money back!