Its lockable zipper provides added security and an improved shoulder strap makes lugging it to and fro a breeze. Comes in three sizes. Small fits packs up to 50 liters in volume. Medium fits packs 45-75 liters in volume. Large fits packs 70-110 liters in volume.FeaturesImproved shoulder strap function, left/rightProtects backpacks when traveling or checking in at airportsWorks as a packable duffel to carry extra gearLarge lockable zipper opening for easy loading and securityTop and side grab handlesID card windowPacks into itselfBUILD YOUR OWN PACKING SYSTEMPart of a coordinated system for optimized packing. Customize your experience by adding on smart packing and organization accessories that meet your exact needs.OSPREY ACCESSORIES INNOVATIONAll of our accessories have been overhauled to offer better organization, operation, comfort and reduced environmental impact.SUSTAINABLE DESIGN+ bluesign® approved main body fabrics+ GRS-certified 100% recycled main body fabrics+ All DWR treatme