Equipment backpack with fabrics made from recycled PET plastic bottles, with Global Recycling Standard certification. Outer material made of robust and water-repellent RPET 900D polyester with ecological water-based PU coating. RPET TC polyester lining. Double lockable PVC-coated YKK® AquaGuard® zippers. The expendable equipment storage compartment doubles the capacity of the main compartment. Includes several removable foam padding and dividers to adjust the interior of the main compartment. Hanging mesh pocket inside the main compartment for headphones, cables, etc. Independent padded compartment for laptop up to 17" + foldable laptop stand. Two individual front pockets that include interior pockets and zipper pockets to organize smaller equipment. USB charger port (power bank not included). Comfortable back padding with channel air vent and hidden document pocket. Riveted, contoured and ergonomic shoulder strap, with metal buckles and adjustable chest strap. Detachable belt carries heavy loads to the hip. Vertical and horizontal carrying handle. Trolley-Sling. Exterior dimensions ( Height/Width/Depth): 56 x 37 x 23-31*cm (*extended). Interior dimensions: 51 x 32 x 9-16* cm (*extended). Weight: 2.5 kg