Cressi Castoro 5mm Wetsuit Mens, with Hanger - Medium The Castoro 5mm wetsuit has been re-introduced for 2010 with a fresh new design Constructed of double-lined 5mm neoprene Abrasion-resistant reinforcements on the knees Powertex anti-wear reinforcements on knees, shins and shoulder Heavy-Duty YKK rear zipper - Aquastop system on wrists and ankles