I purchased this shirt for high activity, which isn’t always a common thing in white button down shirts. I paired this shirt with the 32degreez white t-shirt. The combination is nearly too sheer. A very tailored fit would probably make this combo untenable. The performance was great! I went from soaked in sweat to dry in 10-15 minutes, with the exception of damp armpits, to be expected though. The collar after at least 2 sessions like this at the end of the day was barely stained. The stretch feature of this shirt makes it nice when sitting and moving. Feel on then shirt tends to soft and silky. This makes the collar stays a necessity. The athletic fit was fairly loose in L. I am a pretty fit 6’2” at 215. As an aside, there is no stretch to the cuffs, which is good, but also kind of perplexing as the rest of the garment stretches fairly readily.