NIKE Aeroloft Flash 800 Mens' Down Running Reflective Vest The packable Nike Aeroloft Flash Men's Running Vest helps keep you visible, warm and comfortable in dark, dreary conditions without weighing you down. Designed to help keep you warm and comfortable without weighing you down The allover, multicolor reflective print helps you remain visible in low light. 800-fill goose down delivers superior insulation with minimal weight Designed to put warmth right where you need it while allowing you to move freely