Especially in environmentally sensitive areas, Burlap Bags are a sound alternative to standard sand or gravel bags. Since burlap is naturally grown (made from the skin of Jute plant) and made without any synthetic materials, Burlap Bags are 100% biodegradable, making them more eco-friendly than poly sandbags. Typical fill is 30 lbs sand or pea gravel. Custom fill weights available as well as different aggregates.