* This is a mail service shipping item. So wondered, and enough experience at the school of the boarder, error-prone in General Institute consists of detailed explanations and illustrations. Not only to explain a general way the detail eye position, position of the Centre of gravity in turn, strength, etc. And HOW TO footage interspersed with examples of various riding 'yellows' unique, very easy to understand, easy to inflate the image. 1 Is useful for intermediate or higher are bumping into the walls as well as start from this that people who raise the riding quality.