I have had these gaiters for over 8 years and they are still going strong. The boot section is made of a significantly sturdy cordura fabric which has withstood countless assaults from the steel edges of my back country telemark skis. The upper is made of pretty sturdy Gore-tex fabric which breathes very well. The top closure is easy to use, the hook and loop velcro seals up the front and the metal hook at the bottom seals the gaitor to the boot positively. I have used these gaitors with my leather tele boots and my much beefier plastic tele boot. You can't go wrong with these gaitors. I must let you know that I belong to Mountaintechs and I get to test Gore-tex and Windstopper products. I acquired these gaitors many years before I joined Mountaintechs.