Gatsby (R) Slow Feed Hay Bag Made of the strongest Challenger poly hay cord for years of use, this hay net has 1" x 1" holes that encourage slower consumption of hay and less waste. Features: Strong Challenger poly cord 1" x 1" holes Item Specifications: Size : 13" diameter and 48" long when filled with hay Material : Challenger poly hay cord Gatsby(R) Your Horse, Our Purpose. Founded in 1979, Gatsby(R) is one of the industry's most recognizable and credible equestrian brands. They are founded on the belief that the more time you spend with your horse, the better - that's why the products designed by Gatsby(R) make sense for the barn and for your budget.