This best-selling hay bag is made of durable teeth resistant heavy nylon. The front is designed with a 8 round hole for easy munching and a wide mesh bottom that allows hay dust but not hay to fall through. Complete with reinforced nylon clip strap top.Features: Best-selling styleTeeth-proof heavy nylonMesh bottom allows hay dust to fall throughRound portholeEasy nylon clip strap top20'' x 30'' with a 8'' round porthole and 6'' wide mesh bottom