The Chinook Silver RDG (Reduced Diameter Grip) boom is another new favorite for many of our team riders here at Ocean Air Sports. The easy loop and go rear end and specific tail piece length markings make getting on the water even faster. The lighter weight of the RDG booms is very noticeable from the first time you get the sail out of the water. 60% Carbon helps to keep the cost down while keeping stiffness up.