The best gym bags have thoughtful features, like a water bottle pocket, a separate compartment for post-workout clothes and shoes, and zippered pockets to keep small items easy to reach on the go.

Plug in Rolling Stone’s exclusive discount code ROLLINGSTONE10 to take $10 off $250 orders on Nine Inch Nails Peel It Back Tour tickets on SeatGeek (for first-time purchases only). When checking ...