Meet the uvex jakkyl hde helmet: a half shell helmet that can be transformed into a full face helmet using a detachable chin protector made of laminated fiber glass. It weighs only 630 grams. The chin guard mounts to the helmet and fixed at the back using a turn lock. You don’t need any special tools to get started.
The uvex jakkyl hde Helmet is available 52-57cm and 56-61cm sizes. It protects your head and keeps it cool. More information is available here.