Why haven't I found these before? I can't believe all these years I've wasted my money and polluted the landfills with those disposable scrub sponges! These things are amazing! I've used them on enameled cast iron, cast iron, stainless steel, wood, porcelain, and even painted walls and they've cleaned everything without damaging. I've washed them in the washing machine twice so far and they are still looking new. Fibers aren't coming apart, color isn't fading and are still as effective as day 1. Do yourself and the planet a favor and buy a pack. They might seem over-priced but do the math on the amount of money you've spent on disposable ones and you will soon understand it only makes sense to. Not sure how long these will last but I've used them daily for 3 months and feel they will probably last me for years. I am so happy to see there are companies out there who still strive to make quality products!