I have only used them to play football in places like Michigan, Ohio, Indiana, West Virginia and some other Midwest states. I see people in the gyms that wear like mediums and they will ask me, "Do i look jacked or what" I tried one on and they seem like they are bench a shirt or something. The t-shirts are cool to train in but once i see the tight ones that makes the guy seem like a stick, laughter! A shirt is a shirt and it can say Nike, Under Armour, Adidas,..etc Just workout