Outer material: polyester 840D 2-tone, PU laminated. Inner material: polyester 400D. Main compartment dimensions: 50 cm x 28 cm. Capacity: approx. 25 l. Opening for hydration system and extra bottle holder. Padded compartment for laptop. Inner pocket for storage. Mesh pockets on both sides. Bottom made of tarpaulin protects against dirt and moisture. Ergonomic carrying system with adjustable straps and mesh padding. Chest strap with adjustable height and extra hip belt. Padded lid better protects the contents. Long zippers allow compartments to open wide. The bright inner material provides good visibility, in bag, All-inclusive guarantee http://www.festool.se/service