LyonFeatures: Made from high quality nylon material 3 main compartments with multiple pockets: Front pockets: it has an additional key chain for keys and offers easy access to your accessories Main compartment: it offers a great packing volume and a computer separator for a laptop up to 15" 2 Side pockets: for umbrellas and water bottles Multi panel airflow system and massaging paddings on the back Flexibly adjusted shoulder straps Backside luggage strap