Headquartered in Busan, a beautiful marine city in Korea, Subone Co., Ltd. operates Korea's first freediving brand, 'Double K'. 'Double K' directly researches, develops, manufactures, and distributes high-quality diving gear. In order to share the fun freediving culture with many people, we not only manufacture diving gear, but also engage in knowledge businesses such as diving education, diving tours, and seminars. Our brand is loved by freedivers and coaches all over the world. The CEO played an active part in the world competition as the national freediving representative of Korea in 2016, and the current employees who make Double K are also active as freediving trainers. People who like freediving are doing freediving and providing quality freediving equipment to more people. Join us for safe and enjoyable diving with 'Double K'.