Darn Tough Men's Pennant RFL OTC Ultra-Lightweight

Darn Tough Men's Pennant RFL OTC - Ultralight Knee-High Functional Sock

Darn Tough Men's Pennant RFL OTC Ultra-Lightweight is a knee-high (OTC – Over The Calf) functional sock designed for those who demand maximum comfort, low weight and a reliable fit in ski boots and high boots. Perfect for skiing, touring, alpine skiing, snowboarding and other activities where precision and temperature regulation are crucial.

Ultra-light feel – precise fit

The ultra-lightweight construction adds minimal bulk to the boot without compromising support or durability. The sock stays securely in place all day long thanks to Darn Tough's signature fit, without slipping or bunching.

Merino wool for comfort in all conditions

Pennant RFL is knitted in a merino wool blend that:

regulates temperature effectively

transports away moisture

naturally counteracts bad odor

This makes the sock just as comfortable during intense rides as it is during long days in the cold.

OTC height – ideal for ski boots

The knee-high design protects the lower leg from chafing and pressure from the ski boot, while providing a smooth and comfortable feeling all the way up.

Built to last – lifetime warranty

Like all Darn Tough socks, the Pennant RFL is made in the USA and comes with Darn Tough's lifetime warranty - a testament to extreme durability and quality.

Product benefits

Ultralight knee-high ski and functional sock

Perfect for alpine, top touring and ski boots

Merino wool for warmth, moisture wicking and odor resistance

Stays in place – no slipping

Minimal volume, maximum feel

Made in the USA with a lifetime warranty

The Darn Tough Men's Pennant RFL OTC Ultra-Lightweight is a premium choice for those who want a technical, thin and extremely durable sock for demanding winter and mountain activities.