MOTORCYCLE Helmet

It's a personal choice of the rider to wear whatever helmet they choose. I only use full face helmets, my choice, and I get to have an open casket if a cager gets me. source

If your state requires that you wear a helmet, it must be DOT approved and have a sticker stating that fact. If you paint it to match your favorite NFL team, you must not paint the DOT sticker or your local constabulary will consider it to be non-approved and will more than likely write you a ticket. source

Another difference in helmet design is that a bike helmet is made for crashing at higher speeds than a skateboard helmet. In my totally unscientific view, a skateboard helmet offers you a shell with some padding to absorb impact, whereas a bike helmet is a hard shell with hard foam that's designed to break instead of your skull. source

I usually wear a helmet for lift skiing and would consider wearing one for the drive to and from skiing. No way am I wearing a helmet for skiing fresh snow! source

Full face helmets inhibit peripheral vision and possibly hearing creating a more dangerous situation. Those helmets are best left for the BMX track for short controlled durations. Helmets protect the head, not the face, and are not designed to protect the face. Have him take up jogging if you don't want to deal with cycling injuries. source