Living up to a name like “The Ultimate Gym Bag” might not be easy, but this bag from Defy features 500 Denier ballistic strength Cordura fabric, 1.9 ounce coated ripstop Nylon fabric and offers a 2-inch flat nylon webbing handle. It doesn’t come with lots of pockets but the camo material says it is read for adventure. This bag might be overkill for a trip to the gym but it is probably the last bag you’ll never need for sweaty socks and dirty underwear.