Rubber/neoprene upper. Neoprene lining. Riding heel and rubber sole. Steel shank. Width medium.
"So Far, So Good"
I've had these boots for 1/2 year now. I've bought rain boots and another pair of muck boots Jeffers used to sell, and they have all disappointed me and been a huge waste of money, as they crack where they are supposed to bend and leak. I wear mine 2x a day doing barn chores and end up digging trenches in flooding rains and so far they are holding up. They are comfortable, easy to get on and off, and easy to tuck jeans into. (And my daughter thinks they are cute :).) I wear a 7.5 and the 8's work fine for me.