The Darn Tough Men’s Run 1/4 Ultra-Lightweight Cushion Running Sock (Style 1040) in Fatigue is a men’s running sock with a thin cushion layer along the footbed for gentle rebound through long miles. The quarter-height shaft sits just above the ankle — high enough to clear the collar of a low-cut running shoe or hiker, low enough to stay out of the way. True Seamless toe construction closes the front of the sock smoothly, so there’s no seam bump at the toes during back-to-back training days.
The knit — 50% Merino Wool, 46% Nylon, 4% Lycra Spandex — runs an even merino-nylon balance where the merino handles moisture wicking and temperature regulation across mornings and hot afternoons, and the nylon carries the sock through repeated training miles. The 4% spandex keeps the cuff tight around the ankle so the sock doesn’t slip. Fatigue is the muted olive-green men’s training colorway.
Darn Tough knits every pair in Northfield, Vermont and backs them with an unconditional lifetime guarantee.






