A mock neck T-shirt featuring long ribbing on the sleeves and a mock neck of moderate height. The material is made by air spinning a rough-feeling yarn made from extra-long staple supima cotton, which was previously thought to be impossible, and knitted by a knitter in Wakayama City. This is ATON's original jersey material that combines color development, luster, a rough texture unique to spinning, and a dry touch that feels good against the skin.