Safety first, I like the integrated helmet mask designs. Eye protection is key and I wouldn’t want him to have hindered vision running through the woods. At minimum full face with an elastic Velcro back that would make it adjustable for multiple size heads.
I’m looking at safety, but my son wants something like call of duty or Halo. These are his choices for style. We are just getting ideas at this point but we have lots of land to play on and a few airsoft guns so we are going to start Having some matches. Me and my older son vs my dad and my younger son. Should be exciting.