Our anatomically-designed trim to fit thermal insole maximizes stability and support while reducing heat loss to keep your feet happy on-and-off the trail when the temperatures drop. Superior Arch Support: Our anatomically-designed insole maximizes stability and support with a medium arch and deep cushioning heel cup.. Poron Comfort Pods: Superior shock absorption and rebound while a reflective mylar base layer reduces heat loss.. Trim to Fit: Now you can have the same fit, feel and performance from Oboz in every pair of shoes.. Spot clean. Imported. . . . . Insole sizing:. . XXS: W's US shoe size 5.5 - 6.5. XS: W's US shoe size 7 - 8. . . . S: M's US shoe sizes 7 - 8 / W's US shoe size 8.5 - 9.5. M: M's US shoe sizes 8.5 - 9.5 / W's US shoe size 10 - 11. L: M's US shoe sizes 10 - 11 / W's US shoe size 11.5 - 12.5. . . . XL: M's US shoe sizes 11.5 - 12.5. XXL: M's US shoe sizes 13 - 14