A jersey and jacket in one: The new Thermobooster p1 from Assos

Thermal insulation with minimal bulk

The Thermobooster p1 is designed to be worn over a jersey and under a jacket. Compared with earlier generations, this model is said to be lighter and have a smaller pack size. This means it can easily be stowed away in a jersey pocket when temperatures rise.

Assos uses Hyperlight insulation to provide thermal protection. The material is designed to prevent the body from getting cold without restricting freedom of movement or compromising the close-fitting design of the Equipe range. The insulation is complemented by Sens-Air-Plus fabric, which is designed to provide all-round protection and breathability.

Aerodynamic fit for training and competition

A key feature of the Thermobooster p1 is its close-fitting design. The sleeves, made from 575cx fabric, fit snugly against the body and are designed to sit neatly over a cycling jersey. This ensures a smooth silhouette, whilst the additional layer of clothing creates as little drag as possible.

A two-way zip allows you to adjust the ventilation whilst cycling. It also makes it easier to access the pockets underneath. Reflective elements are designed to improve visibility in low light. The new Assos A logo adds a subtle visual touch.

Full details on the Thermobooster p1

• A lighter and more compact version of the Thermobooster
• Hyperlight insulation for extra warmth whilst keeping the weight down
• High breathability for varying levels of exertion
• A close-fitting, aerodynamic design for wearing over a cycling jersey
• Two-way zip for regulating ventilation
• Reflective details for improved visibility

The Thermobooster p1 will be available from August 2026. The unisex version in the colour Kosimo Granite costs 200 euros.