For the price, the Giro Ultralight Aero Shoe Cover is a good shoe cover. With added material to protect the toe. The fit is a little tight and all one peace, I can not get the show cover on with my foot in the show. it is best to get one size bigger then the size chart shows.
Very hard to get on and off especially after a long, hard time trial, but they are very durable. I purchased a similar product from another company (primarily because these were so hard to get on and off) The other Aero Shoe Cover cost more than twice as much but self destructed after only about wearing them five times.