Incredibly versatile, the EMS Sector 35 Daypack can be used for everything from a carry on to day hikes to hut trips.. . Adjustable harness fits torsos between 17 and 20 in.. Aluminum stay provides stability and support, but can be removed to save weight. Breathable back panel and shoulder straps for maximum comfort. Front slash pocket for quick access to important items. Hydration compatible reservoir not included. Two side stretch mesh pockets are perfect for holding water bottles and keeping important items easily accessible. Two zippered hip belt pockets. Tool attachment loops with bungee tie offs keep trekking poles or ice axes secure. Side compression straps keep loads balanced and stable.