Suitable for steep slopes (1:1 or greater) with heavy run-off conditions. These blankets are made of double cleaned mattress quality coconut fibers. The C400B blankets have top and bottom biodegradable netting for more ecologically sensitive areas. These blankets durable coconut fiber matrix create a highly effective liner for channels and shorelines where vegetation establishment is challenging. Coconut blanket with top and bottom biodegradable netting.