Women's CROCSTM Classic Puff Moc - Black - Flats Enjoy functional warmth and style in the classic puff moc. With a shape and fit derived from the classic clog, this moc features a nylon puff upper, microfleece lining and warm fuzzy footbed for everyday cozy vibes. Plus, the collapsible heel allows for dual styling capability, to wear as a closed heel shoe or an open back mule. Look to the classic puff moc for effortless style and warmth when the weather turns cold. Classic puff moc details: fleece-lined quilted puff upper warm fuzzy footbed collapsible heel allows for dual styling capability pull tab provides easy on convenience.