The ubiquitous shop rag, keep it simple, keep it handy. Don't wash it the first time with your whites. Don't ask how we know that.
Made and in America
Fits in your back pocket
These are probably the best thing we've added to our everyday carry. You don't realize how much you need one until you've got one in your pocket. Wear one for a week and see the difference, more useful than a pocket knife. These are preshrunk and dyed.
You're gonna love these other products, I guarantee it.