Don't call them sweat pants...
OK fine, they're sweat pants. Face it. You're never going to look cool in sweatpants. BUT, you can look less dorky. If anyone can make a good lookin sweatpant, it'e RVCA. They feature textured material, have a draw string, front pockets, and a zip back pocket.
Get yourself a pair for winter.
Size 32 waist should go with medium.