I spotted these boots on a woman and followed her around in Starbucks, trying to read the back of her boots without having her notice! So glad I did. These are super cute and of very high quality. It says on the label "the finest single-estate 100% natural rubber from sustainable harvests." They are no-PVC, no-animal by-products. That's why they are expensive. Only one caveat: the fit is slightly "funny." Hard to describe ... kind of like the footbed is not quite straight for the foot. Wearable, but I will need to get used to it. Also, I have a medium foot and it just fits in the width. I cannot imagine that someone with a wider foot could make this work (but you can try...). These are not lightweight by any stretch, but not too heavy either -- ie, I bought the men's Baffin Marsha Mid Rain Boot recently and that was far heavier and I returned it. I wear a size 10 shoe and a size 40 in this boot. I am a woman in my 50s -- get them, you will be totally hip like me. Am going to buy a pair for my daughter too.