UZ 3/3 LS Skin Layer P1

UZ 3/3 LS Skin Layer P1

The UZ 3/3 LS Skin Layer P1 is the warmest base layer in the ASSOS Skin-Layer family and was developed for extremely cold winter days on the bike in Switzerland. The highly elastic wool blend with merino wool provides close-to-body insulation, while the ultra-high collar that can be used as a turtleneck noticeably extends the protection area. The one-piece, seamless Second‑Skin construction minimises friction and supports a dry-warm microclimate directly on the skin. In the ASSOS climate classification, it's the 3/3 Winter layer; available in three sizes (0–II).

• Ultra-high, rollable collar for additional protection of neck and nape.
• Body fabric with 50% PP / 31% WO / 10% PA / 6% EA / 3% CF, neck fabric with 91% PP / 6% EA / 3% CF.
• Permanent odorControl thanks to integrated carbon fibres and merino properties.
• Seamless one-body construction with Second‑Skin fit and Push‑Pull moisture management.
• Developed as the warmest Skin Layer option for Ultraz / Deep‑Winter applications.
• Available in three sizes (0–II) for close-fitting, layering-suitable fit.

Technical Details and Features

At its core, the UZ 3/3 LS Skin Layer P1 uses an ultra-soft, breathable yarn blend with merino wool, polypropylene and carbon fibres that retains heat and reduces odour formation. The main body consists of 50% polypropylene, 31% wool, 10% polyamide, 6% elastane and 3% carbon fibre; the collar relies on 91% polypropylene, 6% elastane and 3% carbon fibre for elasticity and shape stability. Through the close-fitting Second‑Skin fit, thermoregulation and moisture transport are optimised so that a dry-warm microclimate forms under jacket or thermal layer. The one-piece, seamless design reduces chafing points, follows every movement and maintains its shape even when stretched.

Applications and Benefits

As the first layer directly on the skin, this layer is made for deep winter, cold winds and long base training rides as well as for intensive training in dry cold. In combination with a winter jacket, it forms a very efficient system that retains heat while simultaneously wicking away sweat quickly, so you don't get cold. Within the ASSOS system, "3/3" stands for the coldest conditions, while the Ultraz version offers even more insulation reserve thanks to the merino blend. Specialist media highlight the high wearing comfort, the raised collar and the first-class fit of the ASSOS winter skin layers, which confirms the practical benefit in everyday life for cyclists in Switzerland.

Care, Fit and Layering Tips

For maximum performance, the layer should be worn close to the body and combined with wind- and weatherproof outer layers, depending on intensity and altitude in the Zurich lowlands or on wintry Alpine passes. The Second‑Skin fit is designed to not bulk up under jackets and maintain freedom of movement. ASSOS clearly positions the Skin‑Layer collection according to seasons; the UZ 3/3 P1 is the warmest level and thus the logical partner for winter jackets and Ultraz accessory layers. Independent reviews of the ASSOS Winter‑Skin‑Layer line emphasise the focus on comfort, warmth and moisture management, which makes all the difference especially on long rides in cold conditions.