The Castelli Estremo cap is made with windproof GORE-TEX INFINIUM™ fabric, providing effective thermal protection without compromising breathability.

Features:
- One size
- GORE-TEX INFINIUM™ WINDSTOPPER X-Fast fabric on the front to block out the wind
- Warmer fabric on the back for optimum breathability
- Cut that completely covers the ears

Technology:
- GORE-TEX INFINIUM™
GORE-TEX INFINIUM™ offers many positive features to suit your needs. You'll find this technology in lightweight, water-resistant jackets, stylish shoes that keep your feet warm, and gloves that are compatible with your smartphone's touchscreen. GORE-TEX INFINIUM™ technology provides flexibility, functionality and style for your active life, so you can explore more, say yes to more adventures and live life to the max every day.