For Christmas I (asked for) received a long sleeve under armor shirt (63% nylon 25% polyester 12% spandex) as a step up to keep me warmer and wick moisture away from my body. The thing is pretty warm for 8oz in weight and definitely does a good job wicking sweat away from my body. As usual, the sleeves are too short. But my real problem is that I can't wear it for prolonged periods of time without it getting itchy. I can wear it a couple hours a day every day and be OK. But not solid for a couple of days in a row. I have been testing it out since January. Any suggestions?