RabのはNikwaxで撥水加工て書いてるな…
https://www.contour-outdoor.com/rab-%E3%82%AE%E3%82%A2-%E5%AF%9D%E8%A2%8B/rab-%E5%AF%9D%E8%A2%8B/sumit-%E3%82%B7%E3%83%AA%E3%83%BC%E3%82%BA/