FII, also known as Freediving Instructors International, is an organization that focuses on safety and teaching the best freediving courses available. Created & taught by 13x world record holder Martin Stepanek. Zachary Small, founder of Hypoxic Hunters, is an instructor that has been taught not only by Martin himself, but also John Dornellas and extends his knowledge and love for freediving & spearfishing to all of his students