Knapsack made of cordura royal blue color with double sewings, wide high visibility reflective stripes, reinforced shoulder straps and strong 10 mm zippers. It is made up of a wide rigid space (24x50) with a central locking with Velcro® for quick opening and a strong Velcro® support, that allows to fix 2 colourful cases and 3 colourful pockets with a double sewing transparent window. It is also characterized by 2 wide red lateral compartments with double zip opening, which are internally equipped with a transparent pocket with strip and two useful rigid adjustable dividers. The knapsack is completed by a frontal wide water-proof pocket, which internally presents two inner straps on one side and a double zip transparent pocket on the other side. The knapsack has a reinforced double water-proof PVC bottom with 5 supports made of plastic material, to ensure maximum isolation. Dimensions: 53 x 50 x 35 cm (LxHxD).