15 Amazon Gym Bags That'll Make You Want to Exercise — All Under $50

ETRONIK Gym Bag ($30, originally $50)

Just when you thought you'd seen it all when it comes to cool gym bag features, this one comes along with a USB charging port. It's ideal for those with phones often running on low battery, perfect for recharging while you break a sweat. It also has a separate shoe compartment, a luggage trolley strap, air vents, and more.