Amazon.com : Columbia Unisex Triple Canyon 36L Backpack 。Columbia Titanium Triple Canyon backpack, 36L capacities, featuring a stowable rain cover for outdoor activities. NWOT-DOES NOT include walking poles Omni-Shield™ repels moisture and resists stains by preventing liquids from absorbing into fast-drying yarns, so you stay clean and dry in damp, messy conditions Compatible with a 3-liter hydration reservoir Adjustable side compression system helps minimize bulk for better balance and easier carrying Side access water bottle pockets. Adjustable sternum strap for support with rescue whistle on buckle Loops on bottom for attaching gear or to seat trekking poles Stowable rain cover keeps your bag dry when you need it most Ergonomic padded hip belt with pockets. Secure zippered top closure keeps essentials safe Easy access top-load with drawcord closure for added security Uses: Hiking