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Sackcloth is a coarse, loosely woven fabric typically made from goat hair or other rough fibers. It is known for its rough texture and durability, traditionally used for making sacks and bags for storing grains, produce, or other goods. Sackcloth has also been used historically as a symbol of mourning or repentance, often worn as a garment or used to cover surfaces during times of grief or penitence.