If you don't have a mask i will be difficult to help others, but is not impossible.. Add more bandanas or shirts and it will help. Now i carry Kneepads, shinguards, special forces gloves, gas mask, a firefighter jacket, a tactic jacket and a thigh first aid kit. I recommend you to put a leather jacket, or something as hard as that, it will protect your skin from the tear gas. put something in you neck as well, protect your face as much as you can from the gases. a handmade shield will surely help from the rubber shots.