Check the listing for details. Osprey Dyna LT Running Hydration Water Vest Blue WL 35-41 “. Color: Blue, Condition: Pre-owned. Listed at 35.00 USD. The Osprey Dyna LT Running Hydration Water Vest in blue is a sleek and functional backpack designed specifically for hiking. With four pockets for storage, it offers ample space for organizing essentials while on the go. The vest style allows for easy movement and breathability, making it ideal for longer hikes. Additionally, the Osprey brand is known for producing high-quality outdoor gear, ensuring durability and reliability for all your outdoor adventures.The Osprey Dyna LT Running Hydration Water Vest in blue is a sleek and functional backpack designed specifically for hiking. With four pockets for storage, it offers ample space for organizing essentials while on the go. The vest style allows for easy movement and breathability, making it ideal for longer hikes. Additionally, the Osprey brand is known for producing high-quality outdoor gear, ensuring durability and reliability for all your outdoor adventures.