How do waterproof fabrics get clean when you wash them if they are waterproof?

I have waterproof warm-up pants that are brand new, and when I washed them (and I saw them sloshing about in the washer) and put them in the dryer, they look like I had just taken them out of the shopping bag.How do waterproof fabrics get clean when you wash them if they are waterproof?
Waterproof simply means that the fabric is treated to prevent the water from flowing through from the face to its backing, thus keeping the wearer (who's body is in contact with the backing) dry.





When you wash the pants, though, you are washing off dirt, food, body oils, etc that have been deposited on the surface of the fabric. Think of it like a window: the window is waterproof (in that water doesn't go through it) but both sides still get dirty and have to be washed.





One thing to note, though: be sure you follow the washing instructions on your new pants carefully. Otherwise, you could wash all the waterproofing right out of them!How do waterproof fabrics get clean when you wash them if they are waterproof?
Waterproof usually means that they are stain proof since most stains are water soluble. You are probably washing what has dried onto the surface of the cloth.





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cool stuff





can you give us the material on the label? like % polyester % cotton whatever?