Cressi Quartz BCDQuartz BCD The Quartz is a full vest inflation developed for scuba diving schools and as equipment for the Rental Centers. It is made of 500 Cordura Denier ideal for intense use and to resist to scratches and cuts. As all the gamma of Cressi B. C. D. s, it features the Integrated Flat Lock Weight System that makes it very easy to remove the ballast. It features a red colored reinforcement band in the upper part of the back, at neck level, to enhance