Built for the coldest winter rides, the Castelli Estremo Thermal Winter Cap combines wind protection, insulation, and breathability in a helmet-friendly design. Polartec® AirCore™ fabric blocks cold wind at the front, while breathable Warmer fabric at the back allows excess heat and moisture to escape. Extended ear coverage keeps you protected without adding unnecessary bulk.

• Polartec® AirCore™ front panels for wind protection
• Thermal Warmer fabric at the back for warmth and breathability
• Extended coverage protects ears from cold wind
• Low-profile construction fits comfortably under a helmet
• Designed for cold-weather winter cycling
• Fit: Regular
• Weight: 50 g
• Temperature Range: Not specified by Castelli
• Seasons: Winter