What Our Gearhead(R) Experts Are Saying:"I've been using the Dyna Pro 7 for long training runs and race days when I need to carry just enough gear. The fit is incredibly secure-no bounce, no rub-and the pass-thru lumbar pocket is genius for stashing a layer without stopping. The included flasks are perfect, and I love how breathable it stays even on long climbs."We count on the Osprey Dyna Pro 7L Running Vest when the terrain is demanding and every gram counts. Osprey designed this vest for serious runners chasing performance and comfort on long miles, blending an ultralight feel with exceptional stability and seamless access to gear. Its race-optimized design keeps essentials within reach and movement completely unrestricted. Built with bluesign(R) approved recycled polyester and breathable 3D airmesh, the Dyna Pro 7 fits like a second skin-stretchy enough to move naturally but structured to hold its shape as we push the pace. Smart pocketing includes a pass-thru lumbar pocket for layers, upper and front stash compartments for nutrition and gear, and bounce-free flask pockets that keep hydration secure. With multiple pole carry options, an included quiver, and space for a reservoir, this vest keeps us dialed in and efficient no matter how technical the course gets.