Designed for runners, hikers, & mountain bikers, this lightweight technical Single Track 12 Backpack holds your hydration & gear without holding you back. Mountain Hardwear's On–the–fly compression & body–hugging fit is paired with venting channels to prevent overheating. Quick stash pocket on front for a jacket or another layer plus a fleece–lined zipped pocket for safe storage of sun glasses, smart phone or other valuables.