Assos Endurance ThermoBooster Base Layer
- In stock On the shelf in our own warehouse. Order before 2pm and it is despatched the same working day; bikes we build are built, safety-checked and despatched in 2-3 working days.
- In stock with our supplier Not on our shelves, but our supplier has it or it is already on its way to us. We bring it in as soon as you order, and the despatch estimate shown allows for that.
- Out of stock Neither we nor our supplier has it right now. Where a date is shown, more is on order and you can order now to secure one from that delivery.
- Stock to be confirmed Not on our shelves, and our supplier does not send us stock figures for it, so we cannot say how soon we could get one. Use "Check availability" and we will ask them and email you back.
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Attributes
| Colour | Black Series |
|---|---|
| Suitable for | Everyone |
About Assos
At the Assos Competence Centre in Ticino, Switzerland, members of the R&D Laboratory share over 350 years of expertise in cycling apparel. Assos use performance-oriented fabrics to construct highly technical garments that are made for true cycling.
Details
A midweight layer that unlocks year-round thermoregulation with adaptable layering, updated with a simplified structure to unlock universal utility - one textile, one zipper, total versatility.
Midweight insulation can provide year-round comfort - if it's engineered correctly. For cool conditions or long alpine descents in the summer, the ThermoBooster P1 layers over a standard jersey for additional warmth. In wet conditions, it insulates the microclimate beneath a rain shell. For extremely cold and wet conditions, it layers beneath a winter jacket for thermoregulation equal to the deepest winter conditions.
Technology
Featured Fabrics
RX textile is Assos' most versatile Roubaix-style thermoregulator. It provides soft, midweight insulation with a highly elastic, low-volume structure ideal for layering.
Construction/Fit
Assos' streamlined regularFit and body-contoured shaping reduce seams, eliminating friction for total comfort and easy layering.
Engineering
Raw Cut: Race-inspired construction that eliminates hems and ridges for clean lines, boosted aerodynamics, and low-volume layering.
Specification
- Composition: Main Fabric 85%Polyamide 15%Elastane
- Temperature: -8 / +20°C
- Fit: Regular
- Riding Conditions: Cold
- Sustainability: OEKO-TEX Textiles / PFAS Free

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