Smaller than a backpack, bigger than your pockets ✨ https://orbitkey.co/UrbanSlingKS The Urban Sling (4L) is the perfect in between when you don't want to carry a bulky backpack, but need to carry more than just what can fit in your pockets. The expandable gusset on the bottom of every Urban Sling makes sure your Sling stays slim when carrying less, but has the capacity for when you need to carry more for those bigger adventures.