EQUIPE RS WINTER LS MID LAYER

EQUIPE RS WINTER LS MID LAYER

The EQUIPE RS WINTER LS MID LAYER from Assos is a highly insulating mid layer for ambitious road and gravel cyclists in Switzerland. Designed for the layering system, it's worn over the skin layer and under a lightweight shell or winter jacket, keeping you flexible in changing conditions. The torso is made from OSMOS Heavy, Assos's warmest insulator, while the hood and face cover are crafted from the lighter OSMOS Light and fit comfortably under your helmet. Practical feature: The mid layer packs compactly into its own pocket when temperatures rise on mountain passes or in the Zurich lowlands; available in blackSeries colour and sizes XS to 2XL. Material composition: 55% polyamide, 27% polyester, 16% elastane, 2% polypropylene. This piece is also referred to as a Thermobooster on official pages and is designed for year-round versatility.

• Warming OSMOS Heavy on the torso for maximum insulation with high breathability
• Integrated hood with face cover made from OSMOS Light, helmet-compatible
• Ramped Storage Pocket serves as secure storage and stuff sack for the mid layer
• Raw-cut hem for flat transitions in the layering system without additional bulk
• Compressive racingFit for efficient layering under aerodynamic jackets
• Packable, ideal for long climbs and descents as well as changeable Alpine weather
• Officially available sizes: XS–2XL, colour: blackSeries (black)
• Independent tests praise the thermal performance; approx. 280g in size S (varies by size)

Technical Details and Features

Assos uses a two-layer textile philosophy for the mid layer: inside, a brushed, soft surface for heat retention, outside a compressive warp-knit structure for stability and layer compatibility. The result is dry, stored warmth without heat buildup – exactly when you're pushing hard in winter training. The hood with face cover is cut to sit cleanly under your helmet; when needed, it can be partially or completely removed without flapping. The raw-cut hem minimises material buildup so base layer, mid layer and outer jacket layer cleanly on top of each other. The Ramped Storage Pocket works double duty: it protects small valuables and accommodates the entire mid layer as a compact package when weather changes.

Applications and Benefits

This mid layer shows its strengths when you want to upgrade lightweight spring/autumn shells towards winter jacket performance without switching to very heavy tops. On long, cold descents or during Bise winds at the lake, the Thermobooster reliably keeps body heat in the system while moisture escapes outward. When temperature rises on the mountain, you quickly pack the piece away and stay within your temperature window. For training rides around Zurich, alpine road bike tours or gravel adventures in the Mittelland: The combination of high insulation, pack size and compression makes the mid layer extremely versatile. Test reports also highlight that it's particularly convincing as an additional warming layer under heavy winter jackets.

Fit and Sizing Notes

The racingFit construction is athletic-tight and tailored for performance in the drops, making layering under close-fitting jackets easier. Independent reviews describe the fit as very sporty, which you should consider when selecting your size. Officially available in sizes XS to 2XL; thanks to the elastic OSMOS structure, the mid layer hugs the body closely and doesn't shift. The helmet-friendly hood and packable face cover provide additional protection in cold conditions without having to carry separate accessories. Weight according to tests is around 280g in size S and varies by size.