Shoe soles that leave marks are no good for keeping floors spotless. Hard, stiff soles are often the culprit when it comes to leaving scuff marks and lines on wooden or tiled floors. You should wear shoes that have non-marking soles before you set foot in certain environments like dance floors, gymnasiums, and friends’ homes—it’s just respectful.

Shoes with black soles are more likely to leave marks than those with light soles, but non-marking black-soled shoes are available.

To test your shoes, flip one over so the sole faces up. Press your thumbnail or fingernail into the sole and observe if the sole is dented from the pressure. If so, the sole is considered soft and is likely a non-marking shoe.

To be even more sure, place a piece of clean white paper on a table or floor. Rub the sole of the shoe against the paper with force, but don’t tear the paper. Also, write with the sole at the heel on the paper. If you see scuff marks, the shoes are not non-marking; if you don’t see any, they are non-marking.