Only worn indoors a handful on times. Dirt on bottom is just from parking lot. Womens size 8. White and lite blue. Great for tennis or pickleball. This season shoe. The NikeCourt Women`s GP Challenge Pro Tennis Shoes offer a wide base for stability and soft foam cushioning for the midsole. The stability is further enhanced by a midfoot plastic plate which helps with quick direction changes. The medial toe has extra rubber to help withstand excessive wear and tear and the forefoot is protected with high abrasion rubber for added traction. The traditional U-throat design provides easy entry and adjustment, and an extra padded tongue is constructed with breathable mesh for cool comfort. Upper: Synthetic Cage for adaptive containment. Extra padded mesh tongue for breathability and comfort. A padded ankle collar helps create a locked-in fit. Midsole: Soft foam cushioning in the heel for a comfortable ride. Outsole: High-abrasion rubber located in the forefoot enhances durability and traction. This outsole is designed for hard court surfaces.