material: Wonderful crystal lattice (High level standard light reflection material, light reflection plain film intensity 300 CPL). Durable function: Be able to bear the brunt, the roller compaction, be able to Bear water, oil, dust, durable more then 24-36 months (usage lieu and the environment should be considered). The design introduction: 1. The body structure is simple, facile 2. Easy installment 3. Be able to bear high pressure, folding, and winding resistance. And even it was bended, it can return to original state 4. The warning is very obvious because of full reflection Looking forward to receiving your e-mail and calling!