Castelli Estremo Thermal Winter Skully: Thermal Protection for Winter Cycling

The Castelli Estremo Thermal Winter Skully is a winter thermal cycling skull cap designed to provide warmth, wind protection, and comfort during rides in cold weather.

Thanks to its combination of technical fabrics, this Castelli accessory protects the head from low temperatures and promotes sweat evaporation, helping maintain comfort while cycling.

Polartec® AirCore™: Wind Protection

The front section of the skull cap features Polartec® AirCore™ fabric, designed to provide wind protection without restricting rapid moisture vapor release.

This technology combines high thermal insulation with moisture management, two essential features for winter cycling.

Warmer Fabric for Warmth and Comfort

The rear section is made from Warmer fabric, which promotes sweat evaporation and helps keep the head warm and comfortable.

The combination of Polartec® AirCore™ and Warmer fabrics allows the skull cap to provide thermal protection and breathability during cycling activities.

Full Ear Coverage and Low-Profile Design

The Castelli Estremo Thermal Winter Skully is designed to fully cover the ears, providing additional protection against the cold.

Despite the thickness needed to ensure warmth, its construction takes up very little space under the helmet, making it a practical accessory for road cycling during the winter season.

The Regular fit completes a thermal skull cap designed for cyclists seeking warmth, comfort, and functionality during rides in cold temperatures.

Technical Specifications

• Fit: Regular

• Size: One Size

• Front fabric: Polartec® AirCore™

• Rear fabric: Warmer

• Wind protection: Polartec® AirCore™ on front-facing surfaces

• Water protection: Light Rain

• Thermal insulation: High, with rapid moisture vapor release

• Coverage: Full ear coverage

• Compatibility: Low-profile construction designed to fit under a cycling helmet

Material Composition

• Front: 100% polyester

• Center insert: 100% polyester

• Lower back: 52% polyamide, 32% polyester, 16% elastane

• Side inserts: 52% polyamide, 32% polyester, 16% elastane