Shimano S PHYRE Toe Shoe Cover Size:42 43 Optimized to guarantee absolute smoothness and it s even Optimized to guarantee absolute smoothness and instantaneous transition between gears even under stress These traits work to boost cornering performance by placing effective edges directly opposing the path of cornering forces Protection Against the Elements: PU coated stretch fabric protects toes from the cold and windOn the Go: Lightweight and packable design so you can stash them in your jersey pocket if the temperature starts to rise mid rideReinforced Durability: Constructed from durable Toss them in your jersey pocket or keep them in your bar bag for those just in case rides when the temperature starts to dip or the wind begins to howl