I did commercial electrical contract work for nearly 4 years and went through two ACL tears and repairs (each knee). After both surgeries, I found wearing steel toe safety toe work boots to be like working with my feet strapped to two concrete cinder blocks all day. My knees no longer had the same strength to bear the weight, so you can imagine these Amphibians by Wolverine were a Godsend! These boots are nearly as light as an average tennis shoe, and that's not exaggerating! The carbon fiber safety toe makes that much a difference. The Gore-Tex material also offers water resistance and have kept my feet dry when having to work out in the rain. So far, these boots have been through some tough jobs, and they don't even show a hint of fatigue. After wearing a pair of these, you'll never go back to traditional steel toes any longer. Especially if your'e an electrician, because an added bonus of the carbon fiber toe is that its non-conductive. Awesome, would definitely buy another pair!

**UPDATE** 5/24/11 - Although I no longer do electrical contracting work, I still wear the Amphibians to work, they are that comfortable and light! They are only beginning to show the slightest signs of eventual wear, mainly where the safety toe stops and the other material begins. Slight tear there, but that's to be expected, as it happens to all safety-toe boots eventually. Still going strong, and I still highly recommend these!