I only tried these on indoors. After purchase, they were stored at home, but there are three stains (two inside, one on the tongue) as shown in photos 13-14. These are believed to be adhesive residue from the manufacturing process. Thank you for your understanding. (Purchased in June 2021 from Yahoo! Shopping) Lightweight and highly breathable, suitable for all weather and both track and field surfaces (includes 12mm antuka pins), these are durable, all-around spikes that can be used for all track and field events. EFFORT SK - Brand: ASICS - Color: White x Navy - Model Number: TTP521 - Size: 27.5 (Standard width with room around the toes)