Hand Made in the USA: The Bedrock classics are old school, ultralight, and huarache-inspired. The tried and true design comes with an expanded rubber Vibram® Sole, our super strong nylon footbed and recycled polyester strap options. Our classics are built for ultralight travel, barefoot-style running, and basecamp festivities. Vibram® Sole: Made from an expanded rubber Vibram® compound that is 9mm thick including our granite grip footbed. 1/2" Wide Recycled Straps: Densely woven stand-up strapping made from recycled polyester and lined with recycled bike tubes. The bike tubes we get come from local bike shops and sometimes mark. Classic Sandals Stats: Average weight per size 9 sandal: 4.5 OZ, 100% Vegan Materials. Giving Back to our Planet: We proudly donate 1% of your purchase to environmental non-profits!