Type... Spikes (for long-distance running) Popular model/series... Adizero Avanti TYO Gender: Unisex Size: 23.5 Color: Blue Brand new, unused Includes pins & pin wrench These are Adidas long-distance running spikes. Although it's an older model, it's lightweight and has cushioning, as well as moderate responsiveness, but I think it's a type that puts less strain on the feet.