Das Problem dabei: Überdreht man den Schraubknopf - was ja eigentlich gar nicht möglich sein sollte -, könnte meines Erachtens z. However, note that they have cork soles. Aguas con eso! Im pleased with this product, which arrived a day earlier than promised. I also love using for reading and listening to music and watch videos on my mobile device as well. No more messy countertop. Overall, I love these protective covers and would highly recommend! NOT kidding - most comfortable shoes Ive ever put on my feet. (which still fit perfectly) but these are about 2 sizes too small! They look pretty stylish and they arent too big.