LW Yellow Reflective Running Vest belt sash Harness Band Jogging Walking Biking Cycling Safety One Size LW Highly Reflective Yellow Safety Vest Harness Belt for Running, Walking and Biking Lightweight (only 5.5 Oz) and adjustable; Unique shape for full range of motions. Yellow Elastic band with Highly reflective strips and areas make you "BE SEEN" and "BE SAFE". Adjustable, fits most people, Height (14-21 in); Waist Width (26-42 in).