The new 11K helmet is designed with overall safety as a top priority. Five specific criteria were looked at with the design team as guidelines to a holistic approach in designing our best helmet ever. First, the helmet absorbs the scary high impact hits as well as it does with the more frequent, less intense hits that can be just as damaging over time. Fit is just as important as impact, the new 11K adjusts 360 degrees to your uniquely head and will not pop off when locked in place. And finally, the 11K is Reebok's lightest helmet without sacrificing fit or impact absorption.