Hit the trail with this high-performance backpack fashioned with a mesh back panel and straps to keep you cool and comfortable. An inner padded sleeve doubles as a hydration pocket and laptop holder, while outer stretch side pockets allow you to easily stow a water bottle or other essentials. Style Name: Patagonia 'Yerba' Backpack (24 Liter). Style Number: 1176999 1. Available in stores.