This is a kids' tennis ball used for PLAY&STAY. It's larger than a standard ball and has lower air pressure, making it ideal for children who are new to tennis. Perfect for kindergarteners and elementary school students who are just starting to play tennis. The air pressure is already low to begin with, but it's likely even lower than when it was new. There is some fuzz and dirt. It can still be used for ball feeding practice or practicing with a low net. Please assess the condition based on the photos. *Please consider this item as a used product.