The Big Bale Buddy is a bag style feeder made out of heavy duty, open weave, UV treated polypropylene. The Large fits round bales between 4 feet 5 inches and 5 feet 2 inches in diameter (measure across the flat end of the bale).The Big Bale Buddy covers the sides and bottom of the bale so that the animals must pull the hay from the top (flat end) A strong elastic holds the feeder up so they are unable to get at the sides to unravel the bale. As the hay gets eaten the feeder collapses down with the bale, keeping the hay inside. The Big Bale Buddy is excellent for keeping hay clean and contained during windy and muddy conditions and can be turned on its side to help keep the hay dry in rainy weather. The Big Bale Buddy has a 100% safety record and will pay for itself in saved hay many times over during its years of use. The material is naturally slippery, dirt will not stick to it and it will not freeze to the ground. Shakes clean and folds up in a tidy bundle when not in use.