Kids Bike Helmet, Adjustable and Multi-Sport, from Toddler to Youth, 3 Sizes

Will it fix a teenager

Are the inside adjustable parts around the head plastic or fabric? My grandsons currently have the type with plastic and won’t wear them.

My son has a head that is slightly bigger than 20 inches so will the medium be able to be small enough to fit so we can get one that will last longer?

Can you please tell me the color blue in pantone color? or pms color for printing purposes?