PreHeels was made with stilettos in mind, but it does its job in any type of shoes. The Made in the USA formula sprays on clear, and conforms to the shape of your foot (on any spot that might feel irritation) to keep skin shielded. An application lasts around six hours, and it’s hypoallergenic and dermatologist tested to be safe for skin. We tried it and were impressed at how easy it is to use and how well it worked—in leather flats and heeled booties, respectively, and we appreciate how easy it is to keep a bottle of PreHeels in your bag or desk for on-the-spot relief. Now any pair of shoes can become a comfortable pair of shoes, too.