Estremo Thermal Winter Cap

What Our Gearhead® Experts Are Saying:

"I wore this on a ride where the wind chill was the real problem, not just the air temperature, and the front panel handled it completely. My ears stayed warm the entire time thanks to the extended coverage. This has become a permanent part of my cold weather kit."

The Castelli Estremo Thermal Winter Cap pairs a wind-blocking Polartec AirCore front panel with a warmer, more breathable fabric across the back, balancing wind protection with heat management under a helmet. The cut extends to fully cover the ears, addressing one of the most common points of heat loss on cold-weather rides. Low-profile construction allows it to sit cleanly beneath a helmet without added bulk. Best suited as a foundational piece in cold-weather kit, worn on rides where wind exposure, not just ambient temperature, drives the need for added protection.