I have several now. Both large and med depending how I want to wear them. I’m 6’ 180lbs, athletic build. Med is snug but not overly. Honestly there’s not a lot between the 2.
Pros
Shirts
Cons
The breathable collar may not stay in place while active
feel and fit were perfect. I am tall and skinny with larger chest and smaller waist. Generally, ones that fit my chest hang like a tent at the waist. This one fits.