I have bought two of these, being so impressed with the first that I bought a second. They are excellent quality, quick drying, comfortable, stylish and good value. They're a great length and cut for a lightly built adult but should provide plenty of room if you're more muscularly built than I am (The description on Amazon says this: "Delivered in the signature compression fit for bolstered muscle support and increased circulation resulting in higher efficiency output and increased stamina." This is, I'm afraid, nonsense. Under Armour make four fitting styles and this is the opposite end of the scale from "compression". The fit is described on the label as "loose" and the models in the photos show this pretty well). I use these for both trail running and long-distance walking; where the properties of being easy to wash and quick to dry are essential. My recent adoption of these for hiking has proved a great discovery. I find the sleeveless design cooler and more comfortable than a conventional sleeved T-shirt when carrying a rucksack. A true vest, with the narrower shoulder hoops, is not nearly so comfortable under the straps of a heavy pack.