Allows the helmet to be adjusted so that it fits the head accurately. This involves altering the volume of the helmet. A ratchet locking system enables one of the helmet’s shells to be finely adjusted to fit.
A combination of Inmold and hard shell: the lower part of the helmet is an Inmold shell, and a hard shell encases the EPS in the upper section. The hard shell allows plenty of room for ventilation channels.
All Alpina helmets are fitted with the Ergomatic strap buckle. The anti-torsion multi-step locking mechanism can be operated with a single hand and cannot come open in a crash.