The skull cap is a self initiated prototype in which I used cow shoulder blades as a plate material. The most important function of a helmet is to protect the wearer of the helmet. Therefore, it is important to cover sensitive areas of the head with a shock-resistant material. This helmet concept is the formed of an individual geometrically matched surfaces. The individual upholstered panels are connected by a flexible yarn. It expands and narrows, depending on head size. The panels protecting all important areas of the head and the appearing gaps supply a ventilation.