2) Usually the rear straps connected together so that can be adjusted via merging of front and rear belt at the position of the ear back (before /, up / down). In Nutcase the rear strap are fixed to the helmet, so that the merger can not be delayed under the ears.
3) Furthermore, running the ventilation ducts with a normal helmet a) by the same and b) in the direction of travel, so that good ventilation is ensured. When Nutcase there are no channels on the inner helmet side, the holes extend perpendicular to the surface of the helmet, so that no air circulation within the helmet takes place