Cold feet can ruin a perfect day on the trail. Our 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.

Insole 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