I got the Air + Vision Refill for my THE SEVENTY2® kit and it covers the essentials well. The RZ Mask has active carbon filters and dual one-way discharge valves, and it's stated to filter 99.9% of airborne particulate matter. The goggles are lightweight with a rubber construction for a snug fit, and I can wear my prescription glasses underneath without trouble. The two glowsticks are waterproof and shock resistant, giving hours of light. Solid refill, though I wish the filters were easier to source separately.