This shirt is awesome! I bought it in the Helio and the Silver/Helio and they are just wonderful. I've worn them in temps over 90 degrees while cycling and I'm cool and comfortable. The silver is somewhat see through, but since I'm wearing a sports bra under these it's not something I worry about. Fit seems to be spot on normal athletic clothing fit. I'm 5'6", some what curvy and normally wear a 6 or an 8, and the medium fits perfect. The side zip pocket is great for holding an i.d., credit card, and my iPhone, sometimes even a full key chain of keys, but I try to avoid the keys. I don't find that the shirt sags too much due to the weight of the phone due to the placement of the pocket. I found the shirts the tiniest bit scratchy out of the packaging, but after one washing they feel like cotton. I also wanted to comment on the smell another person mentioned. I have not experienced anything that smells like pee, but after a hot ride (85+ degrees) with lots of sweat, I notice a bit of a wet wool smell, nothing unpleasant, and certainly not as stinky as pee or b.o. I can go 3 or 4 days without washing, probably longer, but thats about how long it takes the husband and I to build up enough wool laundry (socks, shorts, underwear). The shirts still look great after many washings in a front loading washer, on the hand wash cycle, with a homemade laundry detergent (3 Tbls. Borax, 3 Tbls, Washing Soda, 2 Tbls, Castel soap to a gallon of water). The only down side is the lack of rear pockets, but then again I don't like things on my back in hot weather and in cooler weather I can remedy this with a cycling specific vest with rear pockets.