Enjoy ultimate visibility during low-light runs with the Amphipod Xinglet Optic Beam Lite Vest! Featuring 360° LED illumination and reflectivity in a lightweight frame, this running vest is a go-to option for after-dark runs. Minimalist featherlight vest weighs under 3 ounces ...Enjoy ultimate visibility during low-light runs with the Amphipod Xinglet Optic Beam Lite Vest! Featuring 360° LED illumination and reflectivity in a lightweight frame, this running vest is a go-to option for after-dark runs. Minimalist featherlight vest weighs under 3 ounces Ultrabright bioluminescent 360° LED illumination technology for ultimate visibility Entirely reflective Xinglet front and back visibility booster zones and adjustable reflective side boosters Fully size adjustable, moisture resistant design Hook and loop closure for easy on/off capabilities USB rechargeable (charging cable included), no batteries needed Solid and two flashing modes with easy push on/off button.