Real sheepskin, UGG doesn’t make them like this anymore. HIGH QUALITY. My mom has these boots in a 10, I am obsessed with them. Warmest boots in the world and they are like 15 years old and look new. So I tried to find them in a 10 for myself but couldn’t so decided to see if I could squeeze into the 9. I can’t (SO SAD). If you need an AMAZING WARM WINTER BOOT THAT WILL LAST LITERALLY DECADES THIS IS IT.