The Mystic MK8 X helmet is designed to give you the ultimate protection & style on the water. The internal padding means that you can customize the fit & works with most head types. Move the pads to find your perfect fit. The dial at the neck, means that you can tighten the helmet for the ultimate fit & support. The FIDLOCK buckle is very easy to use & keeps your helmet securely tightened. It closes automatically & an be opened with ease by sliding laterally using just two fingers.