A real time-saving invention!  Once you've used them you will want to keep on using them!  Made with great care and quality.  The zippers and eyelets are strong for long-lasting use.  I've used these for years on different boots ( you have to make sure you get the right size for the number eyelets on your boots for the right fit).  Follow instructions - you will need to adjust the ties at first to get the tightness just right because the ties stretch at first, but once they are set, you have one quick motion to zip the boots and you are on your way.  A must for fire fighters or anyone who has to be on the move in a hurry!