We can't think of a staple in our closet more beloved, oft-worn, and invaluable than the button-up shirt. Its on rotation through all four seasons, finds its way into all occasions, and manages to never really go out of trend—which means we've got lots of them. If you've found that you have a hole in your lineup (Plaid? Sheer? The elusive mullet option, anyone?), we recommend checking our roundup of button-up shirts.