When purchasing traffic safety equipment, you must prioritize material durability and visibility. For traffic cones and delineators, ensure they are made of high-quality PVC or TPU to guarantee flexibility and impact resistance. For reflective products like vests or road studs, verify the use of high-intensity prismatic (HIP) or diamond-grade reflective sheeting that meets ASTM D4956 standards. Additionally, solar-powered items should feature IP68 waterproof ratings and lithium iron phosphate (LiFePO4) batteries for extended lifespans in extreme weather conditions.