Material: 100% Polyester. A real classic. Volume: 30 LIntegrated rain cover.Big main compartment with zipper.Two mesh side pockets.Soft, adjustable, quilted shoulder straps.Padded, ventilating backside.Adjustable waiststrap for best fit.Columbus 30L backpack by Swedemount. Roomy, lightweight backpack with adjustable bands. Multiple, practical compartments with zipper. Hardwearing material perfect for hiking and everyday life.