Nike Elemental Backpack (21L). Make it easy on yourself while packing up your lunch, gear or clothes for an overnight. From work to play, this bag is built to store what you need. It's got a dual-zippered main compartment that gives spacious, secure storage and multiple easy-access zippered pockets that offer organisation on the front. Stash your water bottle in the side and you're ready to go. Padded shoulder straps and a back panel offer support. Haul loop offers a convenient carrying option. Open mesh on padded back panel promotes ventilation. 100% Polyester.