The Ultra Pro running vest has been enhanced for improved breathability and comfort with the addition of 3D Micro Mesh. It offers plenty of front cargo storage for easy access to fuel and a secure zippered pocket for your phone.The Ultra Pro Hydration Vest includes tons of room for critical items when you're on the go. We've included two 500-ml Quick Stow Flasks, and the vest can accommodate a 1.5-liter Crux reservoir for superior hydration. CamelBak has designed this women's hydration vest for maximum comfort. Our durable running vest features a secure zippered phone pocket, a stretch overflow pocket perfect for rain gear, and a trekking pole carry that allows you to easily remove or store poles while running. For added safety and security, this running vest is enhanced with reflective accents for higher visibility during low-light hours. Our Got Your Bak Lifetime Guarantee covers all reservoirs, backpacks, bottles, and accessories from manufacturing defects in materials and workmanship for the lifetime of the product. The CamelBak Ultra Pro women's hydration vest measures 14.2 x 9.4 x 4.3 inches and weighs only 5 ounces.