Vulcanized rubber made in Japan Unisex Purchased from Gardenheir for $220 Extremely high quality If you aren’t familiar with Moonstar, look them up! They are waterproof. Great for walking in the rain or working in the garden. Stylish and comfortable. Like wearing chucks. Wore them a couple times before accepting the fact that they were slightly too small. So now I’ve ordered the larger size but can’t return these. I can ship these in the new box for the larger size. I normally wear 9.5, so I’d suggest purchasing these if you are closer to a regular women’s 9. The natural rubber is similar to rubber on Hunter boots that can have a matte appearance or “bloom” when they are being broken in, which is totally normal