For the swift, light and fleet of feet who skim over the surface, roads or rocks with little need for more than a few supplies—for everything from a 10k to a 100 miler. You are the Spry. Now, with Max 02 Sternum, trash pockets, shock cord for greater versatility and larger quick stash in the back for more carrying capacity. 1lt. Bladder compatible. One size fits most.