Some people are calling them revolutionary. But that's what they called Lenin, and look what it got him. Anyway, remarkable new advances have been made and you can have fun checking 'em out in the boot department before you buy a second hand pair of loafers. Many of the innovations have been made by snow-boot manufacturers who have adapted their technologies to hiking and mountaineering. To cradle the heel and cushion the sole.
Leather is strong, tough, durable and heavy.
Great for serious mountaineering. Lightweights are made of plastics, nylon and other synthetics. They literally take a burden off your feet. Sturdy, flexible, and comfortable, they are perfect for hiking and most backpacking. Welts are stitching systems that join boot to sole.