I really like this performance shirt. This shirt is 65% polyester and 35% Rayon. At first when putting it on I thought it would be too hot. I was wrong, this shirt kept me cooler than my other performance shirts from other top name brands that are 100% polyester. The honey hole performance shirt was more breathable. I am not a smelly person by any means but I have noticed all other performance shirts give me BO at the end of a long hot day of fishing. The honey hole long sleeve performance shirt did not. The fit is much nicer on this shirt in my opinion. It is snug around the shoulders, chest and arms but looser around the stomach and waist. I am 6’0” 185 lbs and the large fit well. I will order more in the future!