The Closca Loop unisex bike helmet covers the most sensitive part of the head and protects it against any impact produced by an accident. In the event of a collision, the impact is dissipated and distributed over the surface of the helmet, significantly reducing the impact. Helmet Loop is a collapsable helmet with a patented design. this is an incredibly convenient design when you have to make stops while biking or on an electric scooter and an elegant way to keep your coveted helmet with you. Thanks to this unique design feature, your helmet fits into a simple tote bag or a small light backpack. When you want to collapse it, just press on it, and in 1 second, it takes 45% less space and becomes totally flat! This unique signature feature got Closca the red dot design award. But your comfort while riding is also our concern: Its innovative ventilation system provides a constant airflow. The vent orifices are neatly concealed to protect you against fine rain, but they are there, and they do work well!. the rear adjustment allows it to adapt to the head just by pulling the rubber protecting the area of the nape of the neck Helmet loop is light, only 12 oz for the M size, and just above 13 oz for the L version. Your safety is the focus of Closca design: The helmet features the double safety certification EN1078 AND CPSC. the helmet stays locked in the event of a collision. And do not worry about how your helmet adjusts to your head: Most users fit with the M size and larger heads require the L size.