The Assos Endurance Thermobooster Base Layer is engineered for the most demanding endurance riders — those who ride through cold mornings, fluctuating temperatures, and long hours where comfort, moisture control, and heat retention are vital. Part of the Assos Layering System, the Thermobooster serves as the dynamic core of your cold-weather kit: light enough to layer, warm enough to stand alone under a winter jacket, and responsive enough to regulate your microclimate as intensity changes. It’s the invisible layer that defines your performance when the elements test your resolve.
Constructed from a dual-density carbon-infused yarn blend, the Thermobooster delivers intelligent thermal management through active moisture transport. The inner layer wicks perspiration rapidly away from the skin, preventing chill, while the outer structure disperses moisture evenly for quick evaporation. This layered knit traps just enough air to insulate without bulk, maintaining consistent warmth even as output fluctuates. The carbon filaments enhance conductivity and odor resistance, ensuring freshness and comfort over multi-hour rides in cold, variable conditions.
The body-mapped 3D structure is pre-shaped according to Assos’s zeroPressure patterning, following the natural contours of the torso and arms to eliminate restriction while promoting efficient stretch and recovery. The fit sits close and compressive, optimizing the transfer of moisture away from the body. A minimal seam layout reduces potential friction points beneath bib straps or outer layers, while the lightweight elastic hem anchors the garment flat against the waistline without bunching. Every millimeter is designed for the ergonomics of long-distance motion — aerodynamic, adaptive, and barely perceptible once on the bike.
Versatility defines the Thermobooster’s purpose. Worn beneath a Mille GT Spring Fall Jersey or paired with the Equipe RS Winter Jacket, it stabilizes your core temperature and extends your comfort window across seasons. It performs in dry chill or damp cold, ensuring consistent protection from early-season endurance rides to deep-winter tempo sessions. The result is not simply warmth, but controlled equilibrium — the Assos sensation of microclimate mastery, where body heat and environment remain in perfect balance.
The Assos Endurance Thermobooster Base Layer redefines what a thermal layer can do: lightweight, compressive, breathable, and infinitely adaptable. Built for the riders who go further when the temperature drops, it turns endurance into an art of consistency — steady, composed, and ready for whatever the road delivers.
