ColumbiaMen's Regular Pants

I have used Columbia apparels in past, but never faced this problem. When i washed this trouser for the first time i was shocked to see the green colour of this trouser running and bucket was full of dark green coloured water . I was lucky not to wash this trouser with my other clothes else it would have ruined all my other clothes. i wonder how nylon fabric was releasing the colour like the cheap roadside brands. I doubt this is the original product. beware .