Mizuno’s CORTECH Chamber encapsulates a stainless steel weight in TPU elastomer, which reduces tension in the face and creates an additional energy source. At the same time, it moves weight closer to the face to reduce spin and contribute to a more solid, powerful feel at impact. Full Ti-811y club head with a very strong titanium face with varying thickness for unmatched ball speed. Built for ultra-low spin through a combination of Mizuno’s CORTECH Chamber, an 80 g stainless steel sole plate, an 8 g stainless steel front weight screw and a lightweight waffle crown. A combination of Mizuno’s CORTECH Chamber and internal reinforcements gives a more solid feel and sound at impact, in all weight settings.