Does anyone know what the weight of a classic Ralph Lauren polo is? Or how about Lacoste or Brooks Brothers? Also, do you know what the standard GSM (grams per square meter) is for a good, high quality polo? Secondly, why are RL, Lacoste, and BB polos generally talked about as durable and high quality. They are pretty standard at 100% cotton I believe. They're not even pima cotton from what I can find. If someone could comment on what it specifically is that makes them long lasting and makes them have great color retension, that would be terrific! Thanks!