When sourcing reflective vinyl, you must prioritize the Reflective Intensity (Coefficient of Retroreflection), typically measured in cd/lx/m². For advertising purposes, Commercial Grade (Type I) is standard, but for high-visibility needs, High-Intensity Prismatic (HIP) is preferred. Additionally, verify the weather resistance rating, ensuring the material can withstand UV exposure for 3-7 years without significant fading or delamination. The adhesive type (permanent vs. removable) and liner thickness are also critical for ensuring compatibility with your cutting and printing equipment.