Since 1978, when an Australian surfer named Brian Smith created the UGG boot, this cozy footwear has been embraced by comfort-lovers around the world—including some much-photographed celebrities. The difference between UGG and its imitators? Grade-A Merino sheepskin, a luxurious treat for feet. (They’re meant to be worn barefoot—try it and you’ll understand why!) In addition to the classic surf boot, the UGG line now includes cozy clogs, rugged winter boots, and the softest, most absorbent slippers you’ll ever wear.