Monofin composed with a tilted shoes (between 35 and 45mm). Lot of atheletes in the french team are using POwerfins monofins (Morgan Bourc'his, Guillaume Nery, Frederic Sessa). Th Japan woman team was world champion in 2012 with POWerfins monofins. Arthur Guerin Boëri became the first man on earth at 300m with a POwerfin monofin !!!!!