This is a heavy treated canvas roll-up for 36" rubber blankets. The canvas is treated for water and mildew resistance. There is extra fabric on both sides of this itenm to cover the sides of the blankets when rolled up. Web straps with buckles keep the bag secure after the blankets are rolled into the cover. There is a handle for carrying the blankets. The canvas will protect the blankets against abrasion and contaminants.