The Tumi Voyageur Malta Duffel/Backpack is the ultimate gym bag. It features a large interior compartment perfect for a towel and change of clothes, and the water resistant zippered pocket on the side is a great place to store a pair of shoes. On the outside you'll find comfortable, leather trimmed carrying handles as well as a water bottle pocket. It also features a crossbody strap that can be removed and reconfigured into a strap to hold a yoga mat. If you decide to take it with on a trip, you can also use the add-a-bag feature to attach it to a suitcase for easy portability.