The Strato Tech Polo is by far the most comfortable and best fitting shirt I have ever worn. No joke. For awhile they only carried them in a few colors but they just added a bunch more so now I have navy blue, a heather red color of some sort, heather green, heather gray and a cool light blue. I know vuori says they are "work out clothes" and yeah they can be. I took my navy blue one on a thru-hike of the Long Trail in Vermont last summer along with 2 vuori Strato t-shirts and 2 pairs of the lined Kore shorts. Perfect choice. Base layer for skiing and mtn biking, check that box too. AND I can wear them to work, out to dinner and just lounging around the beach in my bathing suit. Cheers!