What Our Gearhead® Experts Are Saying: “Grab the Duro LT when you want water up front, a shell in back, and zero bounce. It disappears on 10–20 milers.”Chase PRs, not slosh. The Osprey Duro LT keeps things fast and tidy: twin 360 ml soft flasks ride high for easy sips, while the airy stretch-mesh body hugs without hot spots. A dual-entry rear pocket swallows a wind shell or gloves, front drop-ins handle gels and phone, and removable dual sternum straps let you fine-tune the fit.