Sloggers are very durable and comfortable and their customer service is incredible AND they're made in the USA. They offer a shoe and a boot in various colors/prints. Every other waterproof gardening clog, shoe or boot I've ever owned has cracked but these. Highly recommended.
I got my first pair (that I still use) at Tractor Supply, but they can be found in lots of places.
http://www.sloggers.com/
