Cold water is your wardrobe's friend. Warm or hot water is great for cleaning white clothing made of natural fibers, but outside of that there is no place for it. Colored clothing or garments made from rayon, nylon, or spandex will last longer when washed in cold water. Not only does the cold water keep the dyes from bleeding and transferring in the wash, but heat is what breaks down the delicate fibers in the clothing. Using cold water in the laundry allows the fibers to stay intact longer which will give longevity to your wardrobe.