The Nike Brasilia 5 Gym Sack is a handy sackpack that is becoming increasingly popular over the years due to its ease of use and versatility. The Brasilia 5 Gym Sack is an update to last year's version and features a 75 denier polyester dobby weave for added durability as well as a 210D nylon material for sturdy construction. The Nike Brasilia 5 Gym Sack also features a drawstring closure for easy access to contents, that also doubles as straps to turn this sackpack into a backpack.