- Perfect for racing and training, the Kooki is an everyday helmet that will match any outfit. This unique helmet combines style, safety and comfort in perfect harmony. It consists of 2 shells, the lower one in EPS and thermoformed PC and the upper one in ABS, with an injection molding system. The inner padding, made of hydrophilic fabric, is breathable and antibacterial and is already equipped with an integrated adjustment system. Front and rear ventilation is ensured ensuring quick drying. Comfort is guaranteed! Weight: 550g The size of KASK helmets corresponds to the circumference of your head at the height of the forehead, in cm.