Victorinox Altmont Active expandable trekking backpack 606906, adapted to maintain a 25-32 liter hydration system by Victorinox from the Altmont Active Lightweight collection. Made of durable and resistant to external conditions material – nylon. Perfect for traveling, hiking or on a tourist trail. Extremely light and durable material at the same time, perfect for everyday trips to the city and for outdoor adventures. Possibility to increase the capacity of the backpack by 7 liters after opening the special zipper. Adjustable chest strap with magnetic closure for even weight distribution. Main compartment closed with a double zipper with practical loops that can be opened even with gloves, on the front an easy-access pocket for small items, inside mesh pocket for water bottle, umbrella, etc. A mesh pocket closed with a zipper and an additional large compartment. Possibility to attach hiking poles outside with a flexible loop system, loops and a system of lines to secure the equipment outside the backpack, e.g. helmets, shoes, climbing equipment and other sports and tourist accessories, practical handle in the upper part of the backpack, reflective elements increasing visibility in At night, in order to improve safety. The back panel of the backpack is molded under pressure to ensure air flow, on the inside there are mesh braces supporting air flow to ensure maximum comfort during long-term wear, it has a pocket fastened with a waterproof zipper for convenient refilling of liquids at any time.