The Castelli Estremo WS Skully has been designed for those cold, cold days when you still want to get out on the bike and you value wearing your helmet.

The Castelli WS Skully features Windstopper X-Fast Fabric to block out the wind and keep you from getting brain freeze. The longer back combines with Castelli jacket collars to provide a draft-free neck closure.

Warmer fabric in non exposed areas aids comfort and breathability while minimizing bulk.

• Gore® Windstopper® X-Fast on the front for wind protection
• Warmer fleece fabric feels soft, wicks moisture, and is really comfortable under your helmet
• Cut long at the back for perfect closure with jacket
• Designed to fit under a helmet and cover the ears
• Size range - Uni-Size
• Weight N/A
• Comfort range -5 to 10c