Jute is a long, soft, shiny vegetable fiber that can be spun into coarse, strong threads. It is produced primarily from plants in the genus Corchorus, which was once classified with the family Tiliaceae, more recently with Malvaceae, and is now included in the family Sparrmanniaceae. Jute is one of the cheapest natural fibers and is second only to cotton in the amount produced and variety of uses. Jute sack is a bag made of jute fabric, used for packing and transporting agricultural products such as cereals, rice, wheat, and sugar. Jute sacks are also used for packing other products such as cement, sand, and fertilizer.