This listing is for a set of three inserts made of 100% natural bamboo fibers. It consists of three layers of organic bamboo double loop terry sandwiched inside of two layers of organic bamboo french terry.
Notice the unique design of these inserts. The width in the back keeps them from sliding forward and getting bunched up in the front. They come in three sizes: NB 4"x10" long, S 5"x12" long, M 6"x14" long, and L 7"x16". Measurements are at the widest point by length.