A lightly insulated midlayer for racing and high-intensity cycling in cool conditions, engineered with ultrabreathable textiles and a second-skin, aerodynamic fit and updated to radically increase breathability.Our WorldTour riders continue to demand the thinnest, lightest, most breathable layers to dial the perfect microclimate temperatures on race day. With light insulation and maximum breathability, the THERMOBOOSTER P1 fits the bill as a slight upgrade to midlayer thermoregulation, whether it's race day or everyday training.The THERMOBOOSTER combines a body of our SENS Air Plus textile with sleeves of 575CX – the same aerodynamics textile used on our ultra-aero RS Shell Jersey S11. To boost versatility, the EQUIPE THERMOBOOSTER P1 includes a pair of ultralight mesh pockets, so it also functions as an outer layer in temperate conditions.Specifications:- Main Fabric 76%PA 24%EA, Sleeve 80%PA 20%EA, Back, Pocket, Hem Insert 70%PA 30%EA- Temperature: +12 / >+21°C- Riding conditions: Cold- Fit: racing- Breathability: 5/5- Insulation: 2/5- Quick drying: 4/5- Packability: 4/5Technology:Construction/Fit:- Our AEPD 11 racingFit is a second-skin, aerodynamic silhouette designed with WorldTour feedback to envelope the body in 360-degree compression and stability.ASSOS aeroScience:- Combining thermoregulation and protection against the chill with pure racing aerodynamics. Full speed, no compromises.FastClosure:- A double-zip construction that allows ventilation from top or bottom. An auto-alignment design guides the sliders into engagement for operation with gloves or in inclement weather conditions.Reflective Detailing:- Reflective elements on the shoulders increase visibility in the low-light, overcast conditions when wind and rain protection are most valuable.