The Enviro-Cone is manufactured from low density polyethylene, this provides superior cold weather performance and increases the life span of the Enviro-Cone when compared to traditional PVC Cones. The Enviro-Cone resists cracking and shattering down to -45 deg F (-42.78 deg C); and even under the hottest conditions, the Enviro-Cone stands tall and vertical in temperatures as high as 180 deg F (82.23 deg C); no more soft and droopy cones in hot weather! the Enviro-Cone provides long term durability with excellent color retention through the use of UV stabilizers and low density polyethylene plastic. With more than 50% of the Enviro-Cone being made of recycled materials by weight, it qualifies for green Points.