I've been wearing Under Armour tactical shortsleeve shirts for two years, and they are by far my favorite warm to hot weather shirt (and I wish casual Fridays at my office were casual enough to get to t-shirts...because I'd be wearing them to the office also!).

I use these for a variety of warm weather tasks: gardening, walking the dog, hiking, baseball/football stadium trips, gym wear and just knocking around.

They are extremely lightweight, wick moisture excellently and over the time I've owned them have stood up well to the perils of laundry (including some where I didn't have a say in what washer/dryer cycles were selected).

The overall look and feel has morphed some since the first ones I wore in 2010. The current version is slightly less slick/shiny in look and feel.

Not for some environments: they arrive with prominent warnings about their flammability (and like most synthetics, this means they will melt rather than burn). If that's not an issue for you: select with confidence.