Bathing hat has neck band with machined-in and firmly sewn foam material plates (8-15mm), space weight 15-20 kg/m3, which run over lower head part area also neck in minimum width of 4.5-5

摘要

The bathin hat has a neck band with machined-in and firmly sewn foam material plates (8-15mm), space weight 15-20 kg/m3, which run over the head part area, also the neck, in a minimum width of 4.5-5 cm as far as the ears, connecting to the area of the atlas and axis cervical bones. The shape can be divided longitudinally or stepped into a corrugation.