Totally agree with you about a mesh jacket I have a klim that I wear in the summer. You’re absolutely right it feels like air-conditioning as soon as you start moving even then with a light color sitting in a light reflects a lot of the heat off. Just keeping the sun directly off your skin makes you feel cooler.Sucks in a way. But hey. Lol. My shoulders are wider then the 3x on that site. So I called and told him I'm a large in the neck a 4x in the shoulders an xl in the waiste and length. Lol. He was like wtf. But said 2xl should do it. Shit wears long for us though. I have no belly to push that extra material out.
But like the title says. TRY.
And you'll love the mesh. Everyone would ask me how I tolerate the coat in the heat. When they finally tried it they thanked me. Keeps the sun off and when you stop and sweat a minute. Soon as you go it's like air conditioning.