The Darn Tough Men’s Run No Show Tab Ultra-Lightweight Cushion Running Sock (Style 1039) in Eclipse is a men’s no-show running sock built to disappear inside a running shoe — the cuff sits below the shoe collar with a protective heel tab that blocks friction against the Achilles. A thin cushion layer along the base of the foot adds gentle rebound without bulk inside the shoe. True Seamless toe construction closes the front of the sock smoothly so there’s no seam bump across long training miles.
The knit — 48% Merino Wool, 48% Nylon, 4% Lycra Spandex — splits merino and nylon evenly so the merino handles moisture wicking and temperature regulation through early-morning cold and hot midday miles, with the nylon carrying the sock through repeated shoe-friction wear. The 4% spandex keeps the cuff tight so the sock doesn’t slip. Eclipse is the deep dark colorway that pairs with black and gray kits.
Darn Tough knits every pair in Northfield, Vermont and backs them with an unconditional lifetime guarantee.






