You can get goggles on here for cheap.
If your on a tight budget, proto masks are good or something by JT. But if you want to stretch your budget a little bit, empire e-vents or v-force profilers arent going for a massive amount of cash right now.
I strongly recommend getting goggles before your gun. Get as decent a pair as you can. Your not want to be on the field steaming up every game/