Stark Safe Reflective Running Vest by Makes Evening Exercise More Safe, Designed For Runners - Harness Quickly Snaps On Comfortably Over Clothing - Adjustable For Men And Women - Run Safely Today! GREATER VISIBILITY - Wearing a vest makes you much more noticeable from every angle. The reflective color of the vest make it so that other people see you better, earlier, and farther away than they used to when you're out walking, running or riding during the night, evening, and also foggy days and very rainy poor visibility days. UNISEX AND ADJUSTABLE - Our reflective vest is Unisex, so it can be worn by women and men. And it is completely adjustable to fit snug or loose and still have plenty of range of motion. Fits easily and can be worn over just about anything. MULTI-FUNCTIONAL - Not only is this vest great for daytime or night time use, it is also recommended for a number of different activities including: Running, biking, event traffic directing, or any low visibility situation. S/M/L: - Waist Band: 63 - 100cm (25 - 39 inch) Shoulder Straps: 38 - 58cm (15 - 23 inch) waist to shoulder L/XL: - Waist Band: 86 - 136cm (34 - 52 inch) Shoulder Straps: 62 - 100cm (24 -39 inch) waist to shoulder