Assos Ultraz Winter Socks P1

The ASSOS Ultraz Winter Socks P1 are premium winter cycling socks built to deliver maximum insulation and breathability in the coldest conditions. Designed for riders who refuse to let frostbite slow them down, these socks blend advanced thermal engineering with high-performance materials to keep your feet warm, dry, and comfortable even on frigid winter rides. ()

Crafted with a triple-layer knit structure in key zones around the toe and midfoot, the Ultraz Winter Socks P1 trap heat where you need it most while still allowing excess moisture to escape — preventing cold, clammy feet. A mix of merino wool and synthetic fibers combines natural insulation, odor resistance, and quick wicking for all-day comfort. ()

The higher cuff (approx. 18 cm / 7 in) ensures coverage above the ankle and works seamlessly with tights or leg warmers, reducing cold spots and gaps that let cold air in. A 160-needle seamless construction wraps the foot in a light compressive support that resists slipping or bunching in shoes.

Key Features

• Triple-layer thermal yarn for extreme insulation without bulk ()
• Merino wool blend for warmth even when wet and natural odor control ()
• High breathability to manage sweat and prevent cold-inducing moisture build-up ()
• Seamless 160-needle design for light compression and secure fit ()
• Tall cuff (~18 cm / 7 in) to block cold air and integrate cleanly with winter kit ()

Ideal For

• Deep winter rides in very cold conditions
• Cyclists who need warm, breathable coverage for long cold-weather training
• Riders pairing socks with winter overshoes or tights
• Anyone seeking premium thermal performance without compromising fit

Materials & Fit

These socks use a carefully balanced 45% polyester, 32% polyamide, 20% merino wool, and 3% elastane blend for warmth, stretch, and durability. They’re engineered for Assos Clima Code 3/3 (winter) conditions — the highest thermal rating in the Assos sock range.

Ride Comfort That Lasts

When temperatures plunge and your toes are most vulnerable, the Ultraz Winter Socks P1 provide a warm, breathable, and secure foundation layer — essential for winter cycling, touring, or commuting. A thoughtful balance of insulation, fit, and moisture management means your feet stay warmer, longer.