The Darn Tough Style 8002 Men’s Pennant RFL OTC Ultra-Lightweight Ski Sock is an over-the-calf merino wool ski sock in the RFL (Really Fine Line) ultra-thin construction. RFL is the thinnest ski sock Darn Tough makes, built for race-fit and performance boots where every millimeter of liner volume counts. True Seamless toe construction removes the toe seam.
The Lightweight Ski Sock – Charcoal colorway pairs easily across everyday rotation. The ultra-lightweight merino blend insulates while staying thin — merino holds warmth when wet and pushes sweat to the outside of the sock, which is the reason serious skiers choose merino over synthetic alternatives. This is the pick for performance-oriented skiers with race-fit boots.
Darn Tough knits every pair at their family mill in Northfield, Vermont. Lifetime guarantee covers the RFL ski line just like the rest of the catalog.
