Features: Water repellent and tear resistant nylon fabric. High quality zippers, easy zip and unzip. Two sides mesh pocket for water bottle or other accessories. Breathable and padded back panel. Adjustable sternum strap and shoulder strap. Survival whistle for emergency. Side and front adjustable straps for hanging trekking pole, tripod or anything you need. Bartack stitching reinforcement. Waist pack for cell phone, keys, small accessories. Alpenstock clasp and tent/sleeping bag straps. Adjustable waist and chest strap. D-ring for small accessories. Specification: Material: Nylon Color: Green / Dark Blue / Black / Orange/ Blue / Black Red / Army Green  /Blue / Red (Optional) Capacity: 40L Weight: Approx. 600g / 1.32lb Size: 52 * 33 * 20cm / 20.5 * 13 * 7.9in Package Size: 52cm * 33 * 3cm / 20.5 * 13 * 1.2in Package Weight: 610g / 1.3l Package List: 1 * Backpack Note: Due to different measurements, please accept 1-3cm error; please allow reasonable color difference as different computer screen may display different colors