evo.com | Osprey Hydration Packs > The Osprey Duro Pro 7 Hydration Vest Pack is a trail running vest built for runners who need more than just a bottle holder. Two front flasks keep hydration accessible on the move, and 7 liters of organized storage means you're covered for everything from a quick 10k to a full day in the mountains. Tons of features, zero excuses. Hydration Included Two Hydraulics(TM) 500 mL Soft Flasks with removable WingStay(TM) stabilizers keep fluids at your fingertips. Wt: 1.4 oz / 40 grams each Main bluesign(TM) approved 86% 75D polyester (100% recycled) / 14% spandex Removable Trekking Pole Dual-Carry System Enables Front Carry or Lower-Back Horizontal Carry Front Harness Attachment Loop for Race-Required GPS Trackers Four Stretch Drop-In Pockets | Osprey Duro Pro 7 Hydration Vest Pack 2026 - Medium in Blue | Spandex/Polyester