Reflective harnesses are great for running, cycling, bike harnesses, motorcycles, hiking, work, dog walking, and for personnel during physical training. Advantage The reflective running belt is made of stretchy fabric for excellent comfort over long periods, comes with a buckle to attach to your waist, shoulders, or backpack, and has a high-visibility reflective design for clear visibility during the day and night and in all weather conditions. Instruction We easily pull the material through the sizing ring to quickly get waist sizes from as small as 31 inches to as large as 42 inches! Note: Ensure that the belt is correctly sized and securely fastened to the body, avoiding excessive looseness or tightness. Assembled Product Dimensions (L x W x H): 5.91 x 2.36 x 1.77 Inches