Cold feet can ruin a perfect day on the trail. The new Thermal Trail Insole has all the comfort and protection of the Trail Hike Insole, with the addition of Solarcore thermal insulation. Developed for NASA, Solarcore's Aerogel technology uses trapped air to provide unparalleled thermal performance.

Features:
ACT Open Cell PU foam formulated for increased cushioning in these insoles.
ACT PU Heel/Forefoot Foam formulated for improved protection in these insoles.
Medium/High Arch Support.
Solarcore Insulation: Aerogel thermal insulator, keeping your feet warm in the coldest conditions.
Anatomically-designed insole maximizes stability and support with a medium arch and deep cushioning heel cup.
Weight: 10.8 oz / 51 g

Sizing:
XXS: W's US shoe size 5.5 - 6.5
XS: W's US shoe size 7 - 8
S: W's US shoe size 8.5 - 9.5 / M's US shoe sizes 7 - 8
M: W's US shoe size 10 - 11 / M's US shoe sizes 8.5 - 9.5
L: W's US shoe size 11.5 - 12.5 / M's US shoe sizes 10 - 11
XL: M's US shoe sizes 11.5 - 12.5
XXL: M's US shoe sizes 13 - 14