The main compartment is large enough for a basketball, not to mention other personal items like laptop, clothes, etc.The large capacity backpack perfectly classifies your items and maximizes the storage of items you need when going out.You can pack an extra pair of training shoes in the bottom compartment of the sports bagThe zippered pocket on the side is for small things like keys.leaving your hands free, perfect for fitness and outdoor sports.The adjustable shoulder straps allow you to choose a comfortable length.