Lightweight and simple, the Ultralight Zipper Sack is a practical solution for keeping smaller essentials organised in your packs and luggage. Comes with a small, medium and large zipper sack to get you going. The Ultralight Zipper Sack Set is part of Osprey’s comprehensive line of accessories for every traveller on any trip — destination: anywhere. Whether it’s keeping your folded shirts neat or storing your filthy, smelly shoes separate from your pressed pants, these pieces make every step of your journey easier, leaving you with room for what really matters — memories. D-ring attachment point for hanging.