Flexible soft 100% PVC (rubber) in one piece molded, No seams to split or tear. Brilliant Fluorescent UV with PIs. Flexibility in heat and cold-bounces back from an impact. Safe for vehicle. Available in Height: 30 cm-45 cm-50 cm-70 cm-90cm with two models of high intensity reflective collars are Single larger band or Double bands. Colors are available: Reddish orange-Fluorescent Green-Fluorescent Yellow.