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Stable carrying and thoughtful storage for longer runs where comfort matters
Osprey says:
This season, the Duro Family sees a lighter, softer design with new 360° stretch structured mesh fabric that prioritises stability and breathability. The repatterned flask pockets and anchored bungees reduce bounce for the included 500 mL flasks. Born and raised among the tallest peaks of the Colorado Rockies, Duro | Dyna has grown to support runners all over the world in various disciplines and terrain. Whether you’re looking for a podium, fastest known time or beautiful activity as the sun rises, Osprey keeps you comfortable, in rhythm and hydrated no matter the distance.
SPEED & STABILITY - Designed with a refined pattern for an improved close to-body fit, the lightweight, bounce-free Duro/Dyna stays out of the way of your running goals.
EASY ESSENTIALS ACCESS - Smart pocketing keeps your essentials, like hydration, gels, included whistle and phone, accessible while out on the trail or around the neighbourhood.
HYDRATION INCLUDED - Includes two 500 mL flasks with new bounce-free flask pockets that keep hydration secure while allowing you to monitor intake. Carry one water flask and one nutrition flask for optimized fuelling on the run.
Our Verdict
The updated 360-degree stretch mesh and revised flask pockets help keep bounce to a minimum. The vest feels notably, more secure when loaded with water, layers and food, which is exactly what I want from a pack aimed at longer runs.
The pocket layout is especially well judged. Front storage is easy to access on the move, while the rear compartments provide enough space for layers, food and mandatory kit without feeling overcomplicated. The soft mesh construction should help minimise chafing while maintaining good airflow, an important consideration for a vest designed to be worn close to the body for extended periods.
For trail runners, mountain runners and ultras , this is a dependable vest that prioritises stability, organisation and long-term comfort.
- Reviewed by Ultralight Outdoor Gear
Features
- Two Hydraulics 500 ml Soft Flasks included
- 360-degree stretch structured mesh backpanel stabilises carry
- Dual lightweight and adjustable elastic vest closure cords
- Front flask pockets with bounce-free patterning and bungee securement
- Vertical-zip front pocket with removable, tuckaway safety whistle
- Compatible with Duro Dyna Pro Quiver trekking pole sleeve (sold separately)
- Front and rear reflective details for safety
- Key clip
- Six stretch mesh food/supplement pockets
- Two zippered, low-profile rear compartments for organised storage or reservoir
- Shove-it pocket with buckle closure for quickly storing items on the go
- Front trekking pole carry using lower elastic webbing and upper, tuckaway elastic cords
- Compatible with Duro Dyna Pro Quiver (sold separately)
- Compatible with Hydraulics 1.5 L reservoir (not included)
- Magnetic bite valve attachment secures reservoir hose
Specifications
- Small Weighs: 229g
- Medium Weighs: 263g
- Large Weighs: 256g
- Flasks Weigh: 44g (each)
Sizing
Vest fit range is based on chest circumference at the widest part of the chest slightly below the armpits
- Small: 34.5-37 in. 88-94 cm.
- Medium: 37-42.5 in. 94-108 cm.
- Large: 42.5-46.5 in. 108-118 cm.
Material & Construction
- Main: bluesign® APPROVED, 86% 70D nylon (100% recycled), 14% spandex
- Contact Mesh: bluesign® APPROVED, 100% recycled 75D polyester airmesh
