Features Three-way carry: backpack, soft brief and shoulder bag Hidden expansion strap takes it from 20L to 30L for one-bag travel Butterfly back panel for ventilation, strap storage and cushioning Maglock magnetic hardware Includes brief handles, backpack shoulder straps, magnetic key ring and removable sternum strap Specs Capacity: 20L, expands to 30L Dimensions: 18 x 12 x 6" (460 x 305 x 150 mm) Weight: 3.97 lbs Fabric: waterproof 500D CORDURA® re/cor™ RN66, air-textured matte Zippers: YKK Aquaguard waterproof A commuter pack that completes your modern wardrobe with elegant functionality, then expands into a 30L one-bag travel pack with a single pull. Black Ember engineers weatherproof, modular gear for people who refuse to choose between function and style. Product Preview: Product Review: