Castelli Summer Skullcap 2026

Castelli Summer Skullcap 2026 is an under-helmet cap designed for riding on hot days. Wear it under your helmet to keep sweat out of your eyes.

• Keeps sweat out of your eyes by absorbing it beneath your helmet
• Designed for hot weather, recommended above 20°C and suitable for use from 15 to 25+ °C
• Extremely lightweight at just 21 grams, so you barely feel it on your head
• Neither waterproof nor windproof and has no peak: use only in dry, hot weather
• One size, simply choose white or black

Technical specifications

• Weight: 21 grams
• Size: One size
• Colours: White, Black
• Temperature range: 15 - 25+ °C
• Intended use: Under the helmet, absorbs sweat and keeps it out of your eyes
• Stated limitations: Not waterproof, not windproof, no peak

Castelli’s roots lie in Vittore Gianni’s tailoring shop, founded in Milan in 1876; Maurizio Castelli created the scorpion brand in 1974. Today it is based in Fonzaso and makes clothing for your rides, from jerseys to shorts. In 1977 it introduced aerodynamic Lycra shorts, used in racing and sold to the public.