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Webster 1913 Edition

Adj.

Made of leather; consisting of leather;

as, a

leathern

purse

“A leathern girdle about his loins.”

Matt. iii. 4.

leathern ‎(not comparable)

(dated) Made of leather.
- Charles Lamb, The Essays of Elia
  He had his tea and hot rolls in a morning, while we were battening upon our quarter-of-a-penny loaf — our crug — moistened with attenuated small beer, in wooden piggings, smacking of the pitched leathern jack it was poured from.
- 1919, Edgar Rice Burroughs, Warlord of Mars, HTML edition, The Gutenberg Project, published 2008:
  Except for his leathern harness, covered thick with jewels and metal […]