WeatherBeeta 600D/Mesh Exercise Sheet in Silver. The WeatherBeeta 600D/Mesh Exercise Sheet is a strong durable exercise sheet that offers your horse protection from the elements in cold wet weather. The 600D Exercise Sheet has a 600 Denier ripstop upper panel which has a 210T Polyester lining. The lower area of the exercise sheet is made from mesh to provide airflow and to keep your horse cooler whilst wearing a sheet during exercise. This waterproof sheet features touch tape closures at the withers, a fillet string and a diagonal reflective strip on the back corners for added safety.