Summer SS Skin Layer P1

Assos Summer SS Skin Layer P1

The Assos Summer SS Skin Layer P1 is the advanced summer base layer generation for hot rides in Switzerland. The new textile blend is 15% lighter, more elastic and even more breathable – ideal as a first layer under road, gravel or MTB jerseys. The short-sleeve design has been tuned so that collar shape and sleeve length harmonise with regularFit and racingFit jerseys and add minimal bulk when layering. The material uses an open-structured Circular Seamless Mesh with permanent odour-inhibiting, carbon-based properties that remain effective even after washing.

• 68% polypropylene / 29% polyamide / 3% carbon fibre for efficient moisture management and long durability.
• Circular Seamless knit construction for seamless feel and low volume under the jersey.
• Second-skin fit for body-hugging fit and rapid sweat wicking directly on the skin.
• Permanent odour control through carbon-infused yarns.
• Summer 1/3 Layering System: blends discreetly under RS, GT or TRAIL jerseys.
• Two variants available: short sleeve (SS) for slightly more coverage and sleeveless (NS) for maximum ventilation.
• Grey Series colouring and sizes depending on availability from 0 to III.

Technical Details and Functions

The core is an open, ultra-elastic mesh in Circular-Seamless construction that allows airflow directly to the skin, creating a noticeable cooling effect. At the same time, the blend of polypropylene and polyamide ensures quick drying, while carbon fibres contribute permanent odour inhibition. The second-skin fit enables layering with very low volume and prevents bunching under tight-fitting jerseys. Assos has tuned the low collar shape and sleeve lengths to match the cuts of modern endurance and race-oriented jerseys. The result is a technical base layer that's lighter, more elastic and more breathable than its predecessor.

Applications and Benefits

The Summer SS Skin Layer P1 shows its strengths on hot Alpine passes, fast after-work rides in the Mittelland and summer gravel adventures. Under high intensities, the material supports moisture wicking, keeping jersey and body dry longer and reducing friction. Thanks to the seamless construction, the layer feels unobtrusive even on long distances and minimises potential chafing points under jersey sleeves or straps. In practice, the base layer disappears under RS, GT or TRAIL jerseys and fits seamlessly into the Assos 1/3 Summer layering concept. Specialist media generally emphasise the combination of synthetic fibres and carbon in Assos base layers for effective moisture management in intensive use.

Care, Warranty and Fit Advice

As a dealer tip, we recommend drying the base layer quickly after rides and washing, and following the care instructions on the label to maintain fibre performance. The body-hugging fit is intentional; if you're between two sizes, choose the tighter option for race-oriented use so the second-skin fit works optimally. Assos backs the item with 2 years warranty plus a Crash Policy, which additionally secures the longevity of the piece. Thanks to the lightweight construction, the P1 is also suitable as a travel and training companion, as it dries quickly and takes up hardly any space in luggage.

Variants and Compatibility

Besides the short-sleeve SS version, there's the NS variant (sleeveless) for maximum ventilation on very hot days or under particularly tight jerseys. Both variants belong to the Grey Series and are tuned to become practically invisible under RS, GT and TRAIL jerseys. For female riders, there are separately developed Women's Summer SS Skin Layer P1 models with the same material and functional basis. This way, everyone finds the right balance of coverage, ventilation and layering comfort for the Swiss summer.