Castelli Summer Skullcap Cycling Summer Under Helmet Cap

The Castelli Summer Skullcap is a technical cycling under-helmet cap designed for summer use, improving comfort and sweat management during road, gravel and MTB rides.

Its ultralight and highly breathable construction helps keep the head cool and dry even during hot weather or intense climbing efforts.

It is designed to fit comfortably under any cycling helmet without creating pressure points or bulk.

Key features

• Ultralight summer cycling under-helmet cap
• Breathable technical fabric
• Effective sweat management
• Elastic and ergonomic fit
• Mesh panels for ventilation
• Quick-drying performance
• High comfort under helmet
• Suitable for road, gravel and MTB

Sweat management and ventilation

The fabric quickly wicks sweat away from the skin, helping prevent it from reaching the eyes during riding.

Mesh inserts improve airflow in key heat zones, increasing comfort in hot conditions.

Extremely lightweight construction (around 19 g), almost unnoticeable while riding.

Helmet comfort

The elastic construction ensures a secure and stable fit under the helmet with no folds or pressure points.

Ideal for riders looking for a simple but highly effective accessory to improve comfort on long or intense rides.

Technical specifications

• Brand: Castelli
• Model: Summer Skullcap
• Use: Road / gravel / MTB cycling
• Season: Spring / Summer
• Type: Technical under-helmet cap
• Weight: approx. 19 g
• Fit: Ergonomic stretch fit

Why choose it

• Keeps head cooler in hot weather
• Excellent sweat management
• High comfort under helmet
• Extremely lightweight
• Perfect for long and intense rides
• Premium Castelli quality

Recommended use

• Road cycling
• MTB
• Gravel riding
• Summer training rides
• Gran fondos
• Hot and humid conditions