They get the job done lol. Although I purchased the correct size for my feet, the opening to get your foot in is quite TIGHT. I put both pair in the garbage. I work from home and trying to lose weight, so needed something to add some activity. Even gave smaller ones to younger cousins as they remained in great condition I just double sided taped the feet to the glass on the roof and all is well. Because silicone is grippy and stretchy, just have to use some finger power to get it there. after a few rides I noticed my heel would clip the mounting clamp on occasion. No funciona bien con los sonidos agudos, por ejemplo el ruido de golpear una cacerola o agitar un llavero con llaves. Side by side the two sets of shoes are identical until you measure the all important ankle strap.