Designed for fast-paced hikes and trail adventures, the Gregory Inertia Hydration Pack delivers comfort, hydration, and smart organization in a lightweight package. Available in 18L and 24L sizes, it includes a 2L Gregory Hydro reservoir with a convenient SpeedClip mounting system for quick hydration on the move. The breathable 3D foam backpanel and ergonomic shoulder harness keep you cool and comfortable, while multiple compartments and stretch pockets offer plenty of space for trail essentials. Whether you&';re hitting short loops or long climbs, the Inertia keeps you fueled and focused. Features: 2L Gregory Hydro Reservoir Included: Features a SpeedClip system for easy loading and a magnetic bite valve for quick hydration access. Perforated 3D Foam Backpanel: Enhances ventilation and comfort during long outings. Stretch Mesh Front Pocket: Ideal for stashing layers, snacks, or wet gear. Zippered Organization Pockets: Keep tools, keys, and essentials secure and accessible. Lightweight Design: Streamlined for speed without sacrificing functionality. Side Water Bottle Pockets: Additional hydration options for longer days.