Agave fiber is a type of natural fiber derived from the leaves of the agave plant. It is commonly used in rope, twine, and other textiles. SISAL, which has five letters, is one type of agave fiber that is known for its strength and durability. Istle, also with five letters, is another type of agave fiber that is softer and more flexible than SISAL. PITA, with four letters, is a type of agave fiber that is lightweight and often used in weaving.