This is a great Tri jersey. It does not fit too tight which is what I like about it. At about a 44 suit coat jacket...the XL fit me perfectly. Not too much super loose material either. It held up well under the chafing of my wetsuit. The styling of the jersey is great too. Far too often you see some ridiculous patterns on these items...and this is pretty basic which is great. I got one in black, and one in red. I should be good with those for the next 3 seasons or so doing about 4 tri's a year. It is comfortable and you could probably use on your bike and running during training. I would recommend this product to all. Nice storage in the back too. I got the select tri shorts as well from Pearl Izumi...they are sharp as well.