I have the fieldshear mach 1 mesh jacket and it is hands down the best mesh jacket I've ever owned. To me mesh is a big trade off - comfort and trading off safety, but I fully recognize on 100+ days, comfort BECOMES a safety issue, so I have always had mesh jackets. The Mach 1 is superb for air flow and it has a combination of hard armor and soft armor at key points. I feel like I'm trading a lot less off with this jacket as compared with other mesh jackets I've owned. And it has a liner for cool mornings to boot.