ASSOS Endurance Thermobooster

The ASSOS Endurance Thermobooster is a midweight layer that unlocks year-round thermoregulation with adaptable layering, updated with a simplified structure to unlock universal utility – total versatility. This item is a uni-sex fit.

This unisex long-sleeve mid layer extends the thermal range of your ASSOS Winter Jacket, keeping you riding in total, protected comfort during cold conditions. ASSOS designed the Endurance Thermobooster to create a versatile layer that lets you add and subtract thermal insulation around your core and arms throughout riding seasons.

Extremely versatile; for winter conditions, layer it over a Skin Layer and under a winter jacket for added thermal insulation. In dry spring/fall conditions—or as a pre-event warmup piece—layer it over the top of your Skin Layer and jersey.

Mid-layer insulation can provide year-round comfort – if it’s engineered correctly. For cool conditions or long alpine descents in the summer, the Endurance Thermobooster 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. 

SPECIFICATIONS
Temperature -8 / +20°C
Riding conditions Cold>Cool
Fit Regular
Breathability 4/5
Insulation 3/5
Windproof 1/5
Waterproof 1/5

Technology overview | The finer details
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.