Grundens Herkules 16 orange bib pants size 5X-Large. The Herkules 16 Pant is made from a heavy cotton canvas base material (7.7 oz. per yard), coated with a special formulated PVC (10.3 oz. per yard) for a total weight of 18 oz. per yard. The PVC coating is specially designed to resist oils and to maintain flexibility in extremely cold temperatures.