Cleat Shield Insoles Patented Synthetic Material Made in USA Can create up too an 30 degree fahrenheit gap from the hot surface (ex.Athletic Turf) too the users foot. Cleat Shield heat-resistant insoles have been field-tested and game-proven to provide continuous relief that is easy to use, durable, anti-microbial, and hydrophobic. Cleat Shields are beneficial for athletes utilizing any turf surfaces. Cleat Shield insoles are thin (less than 3.5mm) allowing the fit of your cleat not to be changed while insoles are in place and doing their job!