NEW IN BOX PreHeels+ creates an invisible barrier on your skin that blocks friction from shoes to prevent blisters, irritation, and hot spots. The coating conforms to the unique shape of each foot for optimal coverage & is invisible, breathable, hypoallergenic and works with all types of shoes. One application provides about 4 to 6 hours of protection, more than twenty times the protection of most blister sticks, & then washes off at the end of the day with a little soap, water & a light scrub.