Source the essential gear for marathon runners and trail athletes. This custom hydration pack is engineered for peak performance, weighing only 230g thanks to its construction of breathable fabric and high-density mesh, which provides optimal fit and super breathability. The adjustable chest strap system is a key feature, allowing users to quickly dial in the fit (suitable for 80-120cm chests) to minimize movement and reduce jumping force while running. Hydration is seamless: a dedicated compartment is compatible with a 1.5L water bladder, complemented by 2 front pockets for quick soft bottle access. Despite its light profile, the vest offers 5L large storage space spread across 7 pockets, including a secure zippered phone pocket (under 6 inches). Crucially, reflective stripes on the front and back ensure maximum safety for running in dark conditions. Partner with us for bulk orders of this technically superior vest, customizable in color and size.