Assos x BOSS Spring Fall Long Sleeve Skin Layer P1 Stay perfectly regulated on every cool-weather ride with the Assos x BOSS Spring Fall Long Sleeve Skin Layer P1, a premium base layer engineered for transitional season and styled through the refined lens of the BOSS x ASSOS collaboration. This latest evolution of Assos' iconic skin layer is lighter than ever, yet smarter in how it insulates. With increased coverage at the neck and a denser front panel weave, it delivers targeted warmth where it’s needed most, keeping your core protected in unpredictable spring or autumn weather. The back and sleeves balance the equation with a more open weave, enhancing breathability and actively managing excess heat during climbs and full-gas efforts. Cut for a true second-skin fit, the Spring Fall LS Skin Layer P1 maximises push-pull moisture management and thermoregulating performance. It sits next to your skin without irritation thanks to its seamless, single-piece construction, reducing friction and eliminating bulk under your jersey or jacket. Whether you're facing chilly mornings, intermittent sunshine or fluctuating ride tempos, this versatile layer helps you maintain a stable, dry microclimate. An essential foundation for serious cyclists tackling unpredictable shoulder-season rides in style.