ACCEL HEAD CUTTER (accelerator head cutter) silicon cap
In three-dimensionally molding it, I do the sincipita in a shape near a human head and, with superior fitting characteristics, restrain a factor of the resistance of the water and the wrinkle that it is.
In addition, by a design to cover to an ear, I smooth the irregularities of the ear and reduce resistance.
Furthermore, I raise neighboring hold by changing the thickness partially and I drag and restrain rise.
Calvarial: It is the thinnest and fits the shape of the head. As she grows well, even a female athlete having a long hair becomes easy to put it on.
The ear outskirts: I keep thickness than a parietal area and seize the irregularities of the ear.
The back of the head, edge in front: High drags a neighboring hold power by keeping thickness most and restrains rise.