Are you tired of wrestling your daughter into a bike helmet Give her a Nina and we doubt she'll take it off. Bern junior helmets are smaller versions of our adult models made with our patented ZIpmold technology. The best part is she can wear her Nina on a bike, skateboard, snowboard or skis. The Nina will give her the protection she needs and the style she wants. Velcro adjustable liner on back of helmet quickly secures or loosens the fit around your head, super easy to adjust - even on the fly.