Ultraz Winter Socks P1

Assos Ultraz Winter Socks P1

The Assos Ultraz Winter Socks P1 are made for cycling when winter allows no compromises. Thanks to three-layer insulation in exposed zones, they retain warmth without neglecting breathability. A higher-cut cuff of up to 18 cm ensures no cold bridges form between sock, tights and overshoes. The material blend with merino wool provides natural odour resistance and keeps you warm even when things get damp. The low-seam 160-needle construction fits lightly compressive against the foot and prevents slipping. The model is available in blackSeries colour and in three sizes from 0 to II.

• Three-layer insulation at toes and midfoot for maximum warmth in cold conditions
• Merino wool in the yarn blend for odour resistance and warmth even when wet
• 160-needle construction for low-seam, pleasantly compressive feel
• High cuff up to 18 cm for seamless layer coverage
• Breathable fabric blend with stretch recovery properties
• Three sizes (0, I, II) and blackSeries colour for uncomplicated setup
• Developed for extreme winter conditions in Swiss cycling everyday life

Technical Details and Functions

The P1 relies on a balanced mix of synthetic fibres and wool that combines the advantages of both worlds: efficient moisture management, reliable insulation and lasting shape stability. The 160-needle construction reduces potential friction points and supports the foot with light compression, so nothing slips or cuts in. Targeted triple layers in the toe and midfoot area increase the thermal shield exactly where riding wind and spray water have the strongest effect. The cuff of up to 18 cm high minimises cold bridges between socks, tights and overshoes. Thanks to the merino wool, the textile stays fresh longer and still provides warmth even with residual moisture, which brings noticeable comfort on long winter rides. Overall, this creates a functional winter sock that combines warmth, breathability and support without adding bulk.

Applications and Benefits

These winter socks are the right choice for training and commuting routes in Switzerland when the thermometer hovers around freezing or drops below. In combination with winter booties, they enhance cold protection while breathability wicks moisture away from the foot. This prevents the typical cold feeling that can arise from sweat buildup and keeps performance stable over long distances. The merino properties help minimise odours, which is practical for intensive blocks or multiple rides per week. The high cuff connects cleanly with winter tights so no gaps form when you're riding in the lowlands as well as higher altitude regions. This creates versatile applications from daily commuting to long base rides at the weekend.

Optional: The P1 fits into the Assos winter line, which is known in specialist media for well-thought-out cold layering concepts, including targeted reinforcements at critical zones. The combination of wool and synthetic fibres follows proven recommendations for winter cycling socks, where warmth and moisture transport are equally important. Specialist articles also highlight that a higher cuff and low-seam constructions can improve wearing comfort in the shoe without adding unnecessary bulk. Those who sensibly complement their winter equipment benefit from a balanced setup of socks, tights and booties for long, cold days on the bike.