These laced rain boots from Denmark have become popular for good reason. They’re made of 80% sustainably sourced, single-estate rubber, and the other 20% is Ilse’s secret recipe. What you’re allowed to know is this: they’re PVC free, contain no animal byproducts, and can withstand temperatures down to -4 degrees fahrenheit. 

Treating the boots with oil once a month will keep the rubber from discoloring as it loses its natural oil.