Diameter 43cm/17in, thickness 4mm/0.15in 97g lightweight design and easy storage. UPF 50+ sun protection visor provides the most robust sun protection on the market, blocking over 98% of harmful UV sun rays. Aluminum ring reinforcement enhances the support effect of the sunshade cap. Aluminum ring reinforcement enhances the support effect of the sunshade cap. Neoprene elastic layer, locks the helmet and prevents the visor from falling off. It is suitable for all climbing helmets with lamp buckle. 1