The Rivers West Safety Dog Neck Wrap is a perfect addition for any dog in low light or night time conditions. You will never lose sight of your dog with the Collar Wrap.he 3M retroreflective material is recognized as the most advanced reflective technology in the world today. It is permanently welded to the fabric and enhances the visibility of the dog in night-time or low light conditions when illuminated by a light source. 3M Scothlite Reflective permanently welded to the fabric that reflect light back to the sourceVelcro for easy neck adjusting and made out of the Hi-Vis Safety Green Fabric It will excel in helping keep pets safeSM:11-12"MD: 13-14"LG:14-15"X-LG:15-18"Style: 3130