The core difference is visibility in low light. A standard collar looks great in daylight but offers no real visibility benefit in the dark, it simply won't be seen by passing drivers or cyclists until they're very close. A reflective collar bounces light back from headlights and other sources, making your dog much more visible from a distance. Reflective collars and harnesses are designed to be high-visibility, durable and comfortable to wear.
Crucially, the best reflective options don't ask you to sacrifice style or comfort for safety. The Zee.Dog NOX collar has crisp and bright colours alongside its reflective properties, is soft on your dog's fur and uses a rubber logo that protects stitches for longer durability. The Collar of Sweden Reflex collar pairs its reflective exterior with silver hardware, making it a stylish as well as functional choice. In short, a reflective collar does everything a standard collar does: holds your ID tags, gives you a place to clip the lead, while adding a meaningful layer of safety for any walk in reduced light.