Silly question but I need a 1) slim 2) cotton or mostly cotton (spandex/cotton mix is fine too) 3) long sleeve shirt for Muay Thai training (not grappling). I prefer long sleeve shirts. Any recommendations? The shirts I find (in regular stores) are usually not slim-fit and after about 20 min of training get baggy and in the way. Areas around arms and my waist get soggy, stretch and droop around me. I tried going smaller to get a snug(er) fit but those shirts usually end up with too short sleeves (for me). EDIT: I really would like to get a plain simple shirt, not a fancy design(ed) one with logos and what not... its a personal preference, that's all.