Major advantages of these traffic cones is the 100% pvc injection molded "One Piece" design. Cones are superior in durability and quality than "flow" molded cones.100% brilliant fluorescent orange is ultraviolet stabilized for long lasting high visibility. Extreme durability and flexibility in extreme harsh and cold temperatures. Unique base provides superior traction on the road. Environmentally friendly and 100% recyclable! All cones meet NHCRP-350 & MUTCD requirements.