OUR ENVIRONMENTAL APPROACH --- Dyeing textiles requires a lot of water and discharges wastewater into the environment. To reduce this impact, we use the following two dyeing processes: 1. We don't colour the interior fabric. 2. We dye in bulk by adding the colour pigments as soon as the yarn is manufactured for the outer fabric of the blue, black and khaki versions, i.e. item references: 8502149, 8551453 and 8731421. How is volume measured?---The volume of each backpack is measured using a standard method: we fill the main compartment, as well as each pocket, with little balls. Then we empty these balls into a graduated container, which gives the equivalent volume in litres. How to adjust your backpack?---1 - Loosen all the straps (straps, belt, load adjuster straps) 2 - Put on the backpack 3 - Tighten the shoulder straps 4 - Adjust the load adjuster straps as needed How to fill your backpack?---Put your heavy items at the bottom. Pack your clothes around these items. Keep your waterproof jacket and/or fleece within arm’s reach. Place small items for daily use (sun cream, map, glasses, etc.) in the pockets. Tested for optimum durability and strength---We carry out several laboratory tests to validate the bag's components: fabric, buckles, straps, foam, zips. For example, for a fabric, we test the resistance to abrasion and tearing, colour fastness when exposed to UV light and washing, and waterproofing. We also conduct tests to check the resistance of assembly using a dummy that reproduces the movements of a hiker to replicate several years of wear and tear on the bag.