Our bulk potato bag is produced from unique black woven, ventilated polypropylene fabric which provides optimum airflow through the bag during normal storageBlack fabric is specially chosen in order to protect the potatoes from lightCarrying Capacity: 2500 lbs 5:1 SfDischarge: 14" diameter spout and 18" lengthLoops: 4 loops, 10" high We use the strongest lightweight material for our bulk potato bags so they can withstand rough shipping and handling. These are durable enough for long periods of storage and can be reused. We choose only the polypropylene fabric of the highest grade. This gives more than ample UV protection for potatoes while in transit and in storage.