Assos Equipe Thermobooster P1 Jersey

The Assos Equipe Thermobooster P1 is the base layer to reach for as soon as the temperature starts to fluctuate. In mild conditions, wear it over a summer RS layer as your outer layer. If it gets colder, simply slip it under your shell or jacket for added thermoregulation.

Assos developed the Thermobooster P1 in collaboration with WorldTour riders, who demand the thinnest, lightest and most breathable layers to find the perfect temperature on race days. While the body is made from SENS Air Plus fabric, the sleeves are made from 575CX, the same aerodynamic fabric used on the ultra-aero RS Shell Jersey S11. With two ultra-light mesh pockets, the Thermobooster P1 can also serve as a fully-fledged outer layer in mild temperatures.

SENS Air Plus fabric
The body of the Thermobooster P1 is made from SENS Air Plus fabric that brings light insulation and maximum breathability perfectly together. It keeps you warm without making you overheat during a high-intensity ride.

575CX fabric on the sleeves
The sleeves are made from 575CX, the same aerodynamic fabric that Assos uses on the ultra-aerodynamic RS Shell Jersey S11. This means less drag exactly where it makes the biggest difference.

Mesh pockets for versatility
Two ultra-lightweight mesh pockets help to make the Thermobooster P1 more than just a base layer: You can also wear it as a standalone layer in moderate temperatures and use the storage space for your cycling essentials.

• Wear as an outer layer over a summer RS layer in mild temperatures.
• Wear as a mid-layer under a shell or jacket in cool to very cold conditions.
• Wear on race days as well as daily training rides.

• Wear the Thermobooster P1 as an outer layer as soon as the temperature is mild enough to cycle without a shell.
• Wear it under your shell or jacket as soon as it gets colder for extra thermoregulation without adding bulk.
• Use the mesh pockets for lightweight essentials when wearing the Thermobooster P1 as an outer layer.

Can I wear the Assos Equipe Thermobooster P1 as a jersey, or only as a base layer?
Both are possible: In moderate temperatures, wear the Thermobooster P1 as an outer layer over a summer RS base layer, with the two mesh pockets providing storage space. In cool to cold conditions, wear it as a mid-layer under a shell or jacket for added thermoregulation.

Why are the sleeves of the Assos Equipe Thermobooster P1 made from a different material than the body?
The body is made from SENS Air Plus fabric for light insulation and maximum breathability, and the sleeves are made from 575CX, the same aerodynamic fabric that Assos uses on the ultra-aero RS Shell Jersey S11. This combines warmth in the body with reduced aerodynamic drag on your arms.

What is the difference between the Assos Equipe Thermobooster P1 and the Assos Equipe RS Winter SS Mid Layer?
The Thermobooster P1 is designed to serve as an outer layer as well as a mid-layer, with mesh pockets for added functionality. The Equipe RS Winter SS Mid Layer, as the name suggests, is specifically designed as a mid-layer to wear under your clothing in winter. If you want flexibility between an outer layer and a mid-layer, choose the Thermobooster P1; if you’re looking purely for a winter base layer, take a look at the Mid Layer.