Heavy duty 80gsm woven polypropylene. Puncture and tear-resistant with hemmed top, triple-stitched bottom and tie strings. Ideal for carrying and storing sand, rocks, general building waste and many other items. Heavy duty 80gsm woven polypropylene. Puncture and tear-resistant with hemmed top, triple-stitched bottom and tie strings. Ideal for carrying and storing sand, rocks, general building waste and many other items.