From the Patagonia website… This versatile, 27-liter 100% recycled nylon tote is lightweight, durable and can be carried by hand, over the shoulder or as a backpack. Made in a Fair Trade Certified™ factory. Lightweight yet Strong 100% Recycled Fabric Lightweight recycled nylon ripstop is weather-resistant and highly packable Multiple Pockets for Gear Organization Main compartment has a large zippered opening for easy access and a handy internal zip pocket (with a key keeper) for valuables; an external zippered organizer holds everything you need close at hand Stretch Water-Bottle Pockets Double stretch-mesh water-bottle pockets Comfortable Mesh Harness Adjustable, highly breathable mesh harness neatly tucks away when not in use Two Carrying Options Can be carried as a tote or a backpack; volume is 27 liters Lightweight and Stuffable Stuffs into its own pocket