Women-Specific Fit: Tailored with body mapping and an S-curved shoulder harness for enhanced comfort, cooling, and stability on the move Hydration Pack with 50oz Reservoir: Crux bladder delivers consistent hydration, ideal for trail running, marathons, and long-distance training Lightweight Running Backpack Design: Ultralight materials and 3D vent mesh provide airflow and comfort mile after mile Secure Essentials Storage: Zippered phone pocket and cargo compartments keep your gear, snacks, and keys within easy reach Trail-Ready Features – Includes trekking pole attachments, reflectivity for low-light safety, and a built-in safety whistle for added peace of mind