Frame made from ecoFLEX, an eco composite resistant to moist, warp, crack, split, Long lasting without maintenance, No Tools Required Easy Assembly, Use as an independent strucuture, or attach to ecoChoice Fontana Chichen Barn, Made from recycled, clean polymers ABS, PVC, HSPS, Combined with Poplar (hardwood) untreated – sawdust, wood flour, cores, tailings.