Elevate your run with our minimalist pack, crafted from premium, durable materials and designed with meticulous attention to detail. It's the ultimate hands-free hydration solution for runners and outdoor enthusiasts of all levels. Design: One Size Fits most with adjustable sternum and side straps 1.5L QuickStart bladder with updated push pull bite valve, that is easier to drink and remove for cleaning Wide side straps that adjust for a secure no bounce fit and elastic keepers to hold excess webbing Tiered Flask and drop in flask behind zippered power mesh pocket on front straps for easy access and multiple storage options Large back storage pocket with separate bladder compartment and hook and loop keepers to keep bladder secure Large back expandable mesh pocket perfect for clothes, gear and other larger essentials, plus elastic pole keeper Back elastic bungee cord designed for additional compression storage Reflective hits for 360 degree visibility Exterior soft, lightweight durable material that dries quickly Lightweight air mesh on interior back and straps for maximum breathability Additional Details: Storage Capacity: 366.1 cu in/6 L Weight w/out bladder: 8.59oz/243.5g Weight w/ bladder: 13.55oz/384.2g