Assos Thermobooster P1 long-sleeved jersey, a versatile, ultra-breathable, easy-to-store thermal layer for high-intensity training, updated with the addition of pockets to allow it to be used as a jersey when it's cooler, or as an intermediate layer for added protection from the cold when temperatures get colder and weather conditions more challenging. The new thermal fabric is a highly stretchy ladderproof material that follows the lines of the body and provides excellent aerodynamics. It is breathable enough to support even moments of maximum exertion, and when temperatures rise or training becomes too intense, ThermoBooster P1 can be folded up like a rain jacket and easily stored in the jersey pocket. The versatile fabric and fit that conforms to the body like a second skin allow it to be used in any season: wear it over a skin layer or summer jersey on spring and fall days, or under a weather protector for added thermoregulation when winter turns harsh.

• Skuba is a new circular knit fabric with a soft, brushed inner surface with carbon fibers that creates a highly insulating, low bulk layer. It is also breathable enough to keep your skin warm and dry at all times, even during strenuous exertion.
  
• AEPD 11 racingFit is an aerodynamic cut that conforms to the body like a second skin, developed with input from WorldTour cyclists and designed to wrap around the body while offering all-around stability and compression. It also helps make this model a versatile low bulk layer, perfect for wearing almost year-round.
  
• OstrichKragen: a soft, insulating collar that allows you to actively modulate your body temperature without having to unzip and expose your throat to cold air.
  
• Twin Pocket: two back pockets offer convenience and versatility if you wear it as a thermal jersey when it's cool.
  
• Raw Cut: the hems at the waist and on the sleeves are raw cut, eliminating transitional creases and allowing the layer to be worn under jackets, gloves, and wind and rain gear without creating creases or friction.
  
• Color: Black (Black Series).