I usually wear a L in Nike pants, but I'm scared to buy the Tech Fleece pants. I'm not fat, but my thighs and calves are bigger than most people's. I'm also afraid if I sized up to an XL the butt would be really baggy and look weird. I wish there was a store nearby that had them so I could try them on before buying them. I hate buying something online and then having to mess with mailing them back to return them. I went to the Chicago Niketown last month and of course they didn't have any of the Tech Fleece pants in stock.