Tuck Osprey's ultra-light Stuff Pack in the bottom of your duffel bag, and you're always prepared for a spontaneous hike or shopping excursion. Weighing in at a mere four ounces, this tiny pack boasts heavyweight features.. . Fabric: 40D Nylon Ripstop. Top zippered slash pocket. Dual-zippered main compartment. Stretch mesh side gear or water bottle pocket. Ultra-compact, built-in storage pocket. Capacity: 1098 cu. in. / 18 L. Measures: 17H X 9W X 7D in.. Weighs: 0.2 lbs.. Spot clean. Imported.