Great base layer
Same review I wrote for the short sleeve version...
I don't like tight clothing and had to order the XXL so that it didn't feel like a compression shirt. I'm 6'0" 175lbs. It's super light and takes almost no space in your bag or pack. Really good warmth from a fabric this that I'm thinking it will make the perfect sleep shirt while snuggled in the down during a sub-zero winter camp. The shirt has kept it's shape very well after 4 washings with no pilling. I think it's the near perfect base layer for medium active sports.