Microfiber lifts dirt particles and carries them away from the surface, with little or no cleaning solution. 80% polyester, 20% polyamide. Reusable and machine washable. The soft, non abrasive material provides lint-free, streak-free cleaning and won't scratch or dull surfaces. At 50 grams, these heavyweight, durable towels significantly outlast and outperform typical microfiber towels and hold much more liquid, up to seven times their weight. Use them wet, and you'll see their scrubbing power as they take out the toughest grime. Use them dry, and they act like a dust magnet. 16" x 16".