The 3 N1-10 allows for 3 carrying options - it quickly and easily can be made from a sling (right or left shoulder) to a backpack (cross or standard) by using the quick release buckles. It can hold a DSLR with mid-range zoom lens attached, plus 2-3 other lenses, flash and some personal gear. Included is a rain cover that folds neatly away into an integrated pocket.