The fit is great Im 5-11 180 lbs and the large fits perfect and really dose keep you cool in the sun, I bought them for fishing.  They are really soft and feel like a silk very comfortable.

However it should be noted that the colors seem to be off from the picture ordered the orange and its not the same orange thats in the picture it is a very bright fluorescent orange. I don't really care since Im using these for fishing in the sun and really don't think the fish care how I look so theres that. That being said Im going to be ordering a few more.