13. The Easy Pullover — There's nothing like slipping a super-soft, super-comfortable sweatshirt on over your tee when the sun goes down — or when the AC starts blasting your desk. These two pullovers are casual, yes, but still nice enough to wear when you don't want to be too scrubby.

Alexander Wang Loopback Cotton-Blend Jersey Sweatshirt, $195, available at Mr Porter; Joe Fresh Hoodie, $29, available at Joe Fresh.