K.O.I., short for Kings Of Indigo, is a sustainable Dutch clothing and denim brand. Combining the American denim tradition with Japanese eye for detail, K.O.I. designs their products as long-lasting classics that can be used from season to season. The brand has a 100% transparent production chain and sustainability is taken into account in choosing their raw materials as well as in manufacturing and working conditions. K.O.I. has been recognised with several sustainability certificates and awards. Koi is Japanese for carp, an old symbol for happiness, love and perseverance.