In the NFL locker room every Sunday ther is a section with approved uniform extras (gloves, socks, sleeves, headbands) which players are directed to use. These are then donated, sold or auctioned each week to various charities and online. If you look online you can find them. A friend who use to work in the locker room at Solder Field use to bring me gloves all of the time. If you notice every week there is a different co ordinated theme of shirts, polos, hoodies, hats, gloves, etc. and they always match. The NFL never stops making money.