Climbers who prioritize lightweight climbing gear over durability should consider investing in a softshell helmet like the Petzl Sirocco or Black Diamond Vapor as a softshell helmet is often lighter while more sensitive to damage. Climbers who prioritize lightweight climbing gear over durability should consider investing in a softshell helmet like the Petzl Sirocco or Black Diamond Vapor as a softshell helmet is often lighter while more sensitive to damage.