The great thing about Airsoft apparel is that you can use it for any other outdoor activity as well and it looks cool.

Uniforms – Invader Gear has in our opinion an unbeatable price/performance. It’s just about picking camo.
Headwear – A Cap or a Boonie to match your uniform
Belts – a must-have, the velcro variant works the best with Gen3 Battlebelt.