Zip Hoodie - Iron Mordant FoxFibre® Double Heavyweight French TerryThe Iron Mordant Foxfibre Double Heavyweight French Terry Coyote 80 is one of the heaviest knits available today, boasting an impressive 825 GSM (24. 3oz per square yard). Its deep, earthy brown hue isn't the result of traditional dyeing but rather a natural blend of Foxfibre cotton and an iron mordant treatment, creating a rich, organic tone that deepens over time. Foxfibre is a naturally colored cotton, organically gown on a single origin farm in