S31 UVD is an ultra short-term straw fiber erosion control blanket designed for use on mild slope and channel applications requiring erosion control for up to 3 months depending on moisture, light, and environmental conditions. The blanket is sewn together on 1.5 inch (38.1 mm) centers. The S31 UVD meets all requirements established in the FHWA FP-03 as a Type 1C erosion control blanket for use on slopes with gradients not exceeding 3:1 (h:v) and has been tested by the National Transportation Product Evaluation Program (NTPEP). The S31 UVD comes packaged in clear shrink-wrap with a red band and includes installation instructions. Different sized rolls are available with 83.7 m2, 167.2 m2, 418 m2, and 836.1 m2 per roll.