The main compartment is big enough for a size 7 basketball, let alone other personal items such as laptop, clothes, etc. The bottom compartment is for your sneakers And the separated bag in the main compartment is for wet items. The 2 mesh pockets on the both sides of the bag are for umbrella or water kettle. The zipper pocket on the side is for small things like keys, wallet or cell phone The drawstring backpack is made from high quality Oxford cloth and polyester lining. Lightweight but durable enough to resist water, dirt, dust. Keeping the stuffs in the bag dry and clean With the adjustable shoulder straps, you could choose a comfortable length. And the more ergonomic wider straps could protect your shoulder from harm by reducing the pressure on the shoulders while carrying heavy items or having a long time journey It is not only suitable for sports like football, basketball, volleyball, baseball, swimming, gym, etc., but also compatible with outdoor activities such as hiking, camping, climbing, etc. Specifications: Material: Oxford cloth Inner lining: polyester Size: 47cm high, 32cm wide, 15cm thick Capacity: 30-45L