I was an orchestra musician in professional symphony orchestra before back pain and tension-induced tinnitus forced me to stop. I can really see the need for this shirt. You sweat like a pig on stage. The temperature in stage lights is often around 30C, and with a thick black jacket it is unbearable sometimes.<p>I solved some of it by using a short sleeves shirt with extra shirt sleeves attached to the jacket sleeves. Best job I have ever had though.