As others have said there is extra room in the arms. There are 3 buttons on each sleeve that goes around the wrist. One allows you to have a nice opening to allow heat to escape from the shirt or air to flow inside. There are two other buttons that allow you to adjust the fitting around the wrist as well. The Atacs FG colors match pretty close to what is picture but it is a bit darker than picture. The colors didn't fade any after 1 wash. This is a BDU top and does not have Velcro for the top to attach patches or other Velcro items. BDU tops do not come that way. It appears to be durable and good material. I have not filed tested it so I cannot give a rating or review based on that. Over all I am impressed with it and I am looking forward to this year hunting season to break it in. ATAGS FG does real good with blending with OD Green gear. I have some desert tan boots that I have with the pants. The boots seem light by themselves but when worn with the Atacs pants, I was surprised how well they did with blending with it.
Summary:
Good material
Good colors
Appears durable
Enough room to put on winter gear / thermals under uniform without being too tight.
I have it 4 stars instead of 5 because the arms are a little roomier around the biceps and elbows than that of a standard BDU top.
Overall I would recommend to as a buy for someone looking for a BDU style ATACS FG Top.