What Our Gearhead(R) Experts Are Saying:"I love how the Intense 5L carries everything I need without bouncing around. The flasks sit snug up front, the back panel breathes well, and there's just enough room for layers, keys, snacks, and poles. It's crazy light, but it still feels stable on long runs."Minimal weight. Maximum motion. The Millet Intense 5L Hydration Pack is built for trail runners who know every ounce counts. Designed with a slim fit and breathable materials, this vest-style pack delivers a locked-in feel whether we're pushing pace on race day or out for long training miles. Two 500ml HydraPak(R) flasks come included for front-loaded hydration, while an expandable rear pocket offers easy access to rain shells or layers on the go. With 100% recycled polyester and a body-hugging harness system, this pack keeps gear in place while minimizing impact-on our stride and on the planet. The Intense 5L is hydration-system compatible and comes equipped with elastic chest cords, secure zip pockets, and removable pole attachments. Whether we're linking mountain ridgelines or sprinting through forested trails, it delivers exactly what we need-and nothing we don't.