"Nathan® Pinnacle Breeze 4L: The Nathan® Pinnacle Breeze 4L is a lightweight hydration vest built for trail runners and endurance athletes tackling long runs where staying hydrated and organized matters. The 4L capacity holds soft flasks up to 20 ounces, while the Quick-Fit™ system lets you dial in the fit on the move without stopping - perfect when you need to adjust for layering changes or just tighten things up mid-run. Two included Nathan x Hydrapak 14 ounce soft flasks with extended straws mean you can drink without breaking stride, and tiered front pockets with elastic cord keep everything locked in place during technical terrain.The vest stays comfortable over extended efforts thanks to soft woven and breathable mesh materials that minimize chafe when you're out for hours. A front zipper pocket secures your phone and valuables, while lower quick-access pockets keep gels and small essentials within reach. Reflective hits distributed around the vest give you 360-degree visibility during early morning or evening trail running, so you stay visible in low-light conditions. The Pinnacle Breeze 4L manages hydration and gear without adding unnecessary bulk, making it a practical choice for runners who want a vest that stays put and keeps essentials organized.Why Our Fit Experts Love It""I took the Pinnacle Breeze 4L out on a two-hour trail run and the Quick-Fit™ system kept everything dialed in from the first mile to the last. The flasks were easy to pull and replace mid-run, and I never felt the vest shifting on the descents."" - Sean, Road Runner Sports Fit Expert, Chula Vista, CAWho It's Best ForThe Nathan® Pinnacle Breeze 4L is best for trail runners and endurance athletes who need reliable hydration and organized storage during long runs, trail racing, or multi-hour training efforts. It suits runners who prefer a vest that stays secure and keeps essentials within reach without adding weight. If you're layering up for variable conditions or running in low-light hours, the adjustable fit and reflective details work in your favor. VIP Family members can take the Pinnacle Breeze 4L for a 90-Day test drive with our Perfect Fit Guarantee."