Subone is a company that leads a new underwater culture. 'Double-K', Korea's first brand specializing in freediving, is leading the freediving culture through equipment development, manufacturing and distribution, as well as diving education, instructor training, seminars, indoor competitions, and marine competitions. Furthermore, we are striving to become a comprehensive marine leisure sport such as scuba diving, surfing, and sea swimming.

Most of the employees with national freediving experience, instructors, and certifications design and manufacture products on their own, and product reviews and improvements from real divers are applied in real time to quickly upgrade products.