Assos Endurance Thermobooster

Meet the Assos Endurance ThermoBooster — a versatile midweight long-sleeve layer built for year-round thermoregulation and adaptable layering on the bike.

Constructed from Assos’s RX textile, this piece offers soft, low-volume insulation with high elasticity for a close, second-skin feel. Its simplified structure — one fabric, one zipper — enables seamless integration into multiple layering systems. It can function over a jersey during cool descents, beneath a rain shell in wet conditions, or under a winter jacket when temperatures drop.

Specs at a Glance

• Fabric: RX midweight, soft insulating textile
• Design: Streamlined construction with minimal seams, raw-cut edges
• Fit: Regular / body-contoured cut for layering comfort
• Closure: Full-length zipper for ventilation control
• Application: Standalone layer in cool conditions; baselayer under shell in cold, wet weather

Design Benefits

1. Adaptive layering: Works in multiple roles depending on conditions — over jersey, under shell, or under jacket.
2. Balanced warmth & breathability: Insulating but not overly heavy, letting moisture escape to avoid overheating.
3. Sleek layering profile: Raw-cut sleeves and edges reduce bulk and friction between layers.
4. Simplified construction: One fabric, one zipper — less complexity, more versatility.

Final Take

The Assos Endurance ThermoBooster is an elegant, performance-driven midweight layer designed to bridge the gap between summer jerseys and full winter gear. For riders navigating variable weather, it’s a smart, minimalist solution that performs across seasons.