Men's Function X Over-the-Calf Midweight Ski & Snowboard Socks Overview
The Darn Tough Men's Function X Over-the-Calf Midweight Ski & Snowboard Socks are designed to deliver warmth, comfort, and a precise fit during long days on the mountain.
Built from a Merino Wool blend, these technical winter socks naturally regulate temperature and efficiently manage moisture to help keep feet warm, dry and comfortable across a wide range of snow conditions. The midweight construction provides a balanced combination of insulation and breathability, making them suitable throughout the ski season.
Targeted cushioning underfoot, across the shins, and over the distinctive Function X support zone helps improve comfort in ski and snowboard boots, while Darn Tough's performance fit reduces slipping, bunching, and friction that can lead to discomfort over a full day on the slopes.
Combined with Vermont-made craftsmanship and an unconditional lifetime guarantee, the Function X socks are built to provide reliable performance season after season.
Best for
- Resort skiing
- Snowboarding
- Winter sports
- Ski holidays
- Cold-weather travel
- Winter hiking and walking
- Alpine adventures
Materials & Construction
Merino Wool Blend — Warmth, Moisture Control & Durability
The Function X socks use a blend of 59% Merino Wool, 38% Nylon and 3% Lycra Spandex to provide warmth, durability and long-lasting fit retention.
Merino Wool naturally regulates temperature by helping retain warmth in cold conditions while efficiently moving moisture away from the skin. This helps keep feet warm and dry inside insulated ski and snowboard boots, where moisture build-up can quickly reduce comfort.
The nylon content improves durability in high-wear areas, helping the socks withstand repeated use in demanding winter footwear, while Lycra Spandex provides stretch and shape retention for a secure fit throughout the day.
Midweight Construction — All-Season Mountain Performance
The midweight knit construction balances insulation and breathability, making the Function X suitable for a wide range of winter temperatures and snow conditions.
This versatile weight provides dependable warmth without excessive bulk inside ski or snowboard boots.
Naturally Odour Resistant
Merino Wool naturally helps resist odour build-up, keeping the socks fresher for longer during multi-day ski trips and winter adventures.
Features & Technologies
Performance Fit — No Slipping, No Bunching
Darn Tough's performance fit is engineered to eliminate slipping, bunching and unwanted movement inside ski and snowboard boots.
This fit helps reduce friction, improve comfort and maintain consistent support from first lift to last run.
Targeted Cushioning — Underfoot Comfort & Shin Protection
The Function X features terry-loop cushioning underfoot, along with a dedicated shin pad designed to help reduce pressure from ski and snowboard boots.
This targeted cushioning improves comfort during long days on the mountain while helping protect key contact points from boot pressure.
Function X Support Zone
Additional cushioning across the distinctive “X” zone on the top of the foot improves comfort and warmth while enhancing overall fit in ski and snowboard boots.
True Seamless Toe Technology
Darn Tough's True Seamless Toe construction creates an ultra-smooth feel inside technical winter footwear.
This reduces pressure points and improves comfort while helping minimise friction during extended use.
Arch Support
Integrated arch support helps reduce foot fatigue and improves overall comfort throughout long skiing and snowboarding sessions.
Over-the-Calf Height
The Over-the-Calf height averages approximately 43cm from heel to cuff and extends to just below the knee.
This tall design provides additional warmth and protection while ensuring the sock remains securely positioned beneath ski and snowboard boots.
Made in Vermont, USA
Every pair is knitted in Darn Tough's Vermont mills, maintaining strict quality control and craftsmanship throughout the manufacturing process.
Lifetime Guarantee
Darn Tough backs the Function X with a lifetime guarantee, reflecting the brand's commitment to producing exceptionally durable socks designed to withstand years of mountain use.
Care Instructions
To help maximise product lifespan:
- Machine wash cold on a gentle cycle
- Turn socks inside out before washing
- Do not bleach
- Tumble dry on low heat or hang dry
- Do not dry clean
Features Summary
- Over-the-calf ski and snowboard sock design
- Midweight Merino Wool construction
- Terry-loop cushioning underfoot
- Dedicated shin protection pad
- Function X cushioned support zone
- Performance fit helps prevent slipping and bunching
- True Seamless Toe construction
- Integrated arch support
- Naturally moisture-wicking properties
- Naturally odour resistant
- Made in Vermont, USA
- Unconditional lifetime guarantee
Explore More Ski & Snowboard Socks
If you're preparing for the ski season, it may also be worth exploring our wider range of outdoor socks, winter base layers and gloves.