Lightweight Running Backpack: Ultralight materials and breathable mesh construction keep you cool and comfortable on long runs Hydration Pack with 50oz Reservoir: Crux bladder delivers consistent hydration, perfect for trail running, marathons, and endurance training Secure Essentials Storage: Zippered phone pocket and cargo compartments hold snacks, keys, and gear for easy access on the move Custom Fit for Stability: Dual adjustable chest straps ensure a snug, bounce-free fit across all terrains Trail-Ready Features: Includes trekking pole attachments, reflectivity for low-light safety, and a built-in safety whistle for added peace of mind