Use it the way you want: either on its own as a very light weight daypack, or as an extension to your Aether-, Ariel-, Porter-, Farpoint 80- or Sojourn bag - Airy AirScape back panel - Padded laptop / tablet compartment - Hydration sleeve - Document sleeve - Light detachable hip strap and chest strap with whistle buckle - LED light latching point at front panel - Compression straps at sides - Elastic mesh side pockets - Elastic "kangaroo" pocket at front - Small item pocket including key clip - Made of 300 denier polyester, made of recycled PET bottles This is a PFC-free product.