The TRMX uses Thorlos’ patented THOR-LON fiber to put dense cushioning exactly where hiking-boot wear shows up — the ball of the foot, the heel cup, and the upper Achilles. The rest of the sock stays trim so the boot still fits properly. Knit-in arch support reduces foot fatigue on long days.
Backpackers, day-hikers, hunters, and anyone whose hiking boots leave blisters or hot spots reach for these. The ankle cut is high enough to protect against boot rub but low enough to disappear under most cargo or hiking pants.
Thorlos has been knitting padded socks in Statesville, North Carolina since 1980 — same family-owned mill, same patented padding.