Great long underwear shirt for athletic builds - bought this for my husband and was quite pleased with the fit. Neck hole wasn't large like they tend to be when you order larger sized, arm length was great for men with large wingspans, and length in torso was long, too! We always have trouble choosing between L and XL, because my husband has an athletic build. XL tends to hang off him like a tent and L isn't ever quite long enough, but this shirt is long, slim, and accomdates muscle.