Used once or twice patagona sling bag! great for hiking/biking, lots of storage from site: 100% Recycled Polyester With PFC-Free DWR Finish All fabrics, spacer mesh and static mesh are 100% recycled (stretch mesh is 84% recycled), body has a PFC-free DWR finish (durable water repellent coating that does not contain perfluorinated chemicals); pack volume is 8 liters Ergonomic, Single-Strap Harness Asymmetrical harness carries weight close to the body for all-day comfort Zippered Front Pocket Larger front pocket keeps a phone or other frequently used item close at hand Divided Main Compartment Internal divider in main compartment Internal Organization Two main compartments with dedicated storage for easy access Tuck-Away Storage Straps Tuck-away front straps for carrying a yoga mat or an extra layer