| 摘要 |
PURPOSE: An underwear is provided to keep the knee parts of the lower trousers of winter underwear warm in particular. CONSTITUTION: An underwear (1) is manufactured by sewing one more fabric layer around the knees on the lower trouser of general winter underwear. The fabric material has a cylinder shape of 20 cm, and the thickness of 1-3 times of the thickness of the existing material. |
