Following this, fundoshi fell out of use at official competitions due to the appearance of flexible fabrics suitable for swimwear as a result of development of synthetic fibers, as well as due to development of sewing techniques.
その後、合成繊維の開発が進み、伸縮性のある水着に適した生地が出現したことや、縫製技術も進歩したこともあり公式競技では褌は使われなくなった。