I purchased this shirt for my husband who usually wears XL. When that arrived we sent it back for a L, which we also sent back to exchange for a Men's M. It's a great shirt for travel and washes and drys in very little time.
I purchased two of these shirts with certain items in mind; vented, long-sleeve, roll-able to short-sleeve, smart pockets and durable. The only thing I cannot evaluate is the durability, as I have not had it for long enough. The shirt is comfortable in warm and cool weather. It looks good on me and also has pockets galore along with sunglass tabs and some other attachment points for small miscellaneous items. I plan to use it on a short salt-water fishing trip in the near future. I may update the review upon my return. Definite Recommended