This running vest boasts an ultra - light feel, ensuring continuous dryness. Its I - shaped design offers lightness and breathability, weighing about 40g. The square grid ladder fabric, with seamless pressure glue and concave - convex texture, prevents friction discomfort while quickly drying and isolating sweat. The I - shaped beautiful back and hollow design enhance heat dissipation, keeping it non - sticky. Cicada - wing ultra - thin and close - fitting, it provides a seamless experience for unrestricted movement. With four - way stretch and night - reflective properties, it’s ideal for racing, running, marathons, and fitness.