What Our Gearhead(R) Experts Are Saying:"I use the Dyna LT for training runs and half marathons where I just need water, fuel, and my phone. The fit is super stable without feeling restrictive, and the mesh material breathes better than most vests I've worn. It's simple, efficient, and stays comfortable from start to finish."We grab the Osprey Dyna LT Hydration Pack when we want to run light, fast, and free. Osprey's refined fit and streamlined design deliver a secure, bounce-free feel that keeps us focused on our pace instead of our pack. It's made for runners who want everything they need within reach-hydration, nutrition, and small essentials-all without unnecessary bulk. The bluesign(R) approved recycled nylon and polyester mesh balance comfort, stretch, and breathability for long training days or race efforts. Two 500mL flasks slip easily into redesigned pockets for steady hydration, while stretch mesh storage holds gels, layers, and a phone. A side pole carry option and compatibility with Osprey's quiver system add extra versatility for mountain runs. Light, stable, and easy to wear, the Dyna LT is the go-to vest when the miles come fast and fluid.