John Mayer Explores American Heritage In His Line of Leather Goods Musician John Mayer has collaborated with leather craftsman Barrett Alley to create a line of bracelets and wallets, which cost $95 to $190 on Mayer's website and are made from U.S. vegetable tanned leathers and deadstock Japanese fabrics. "We wanted to make a limited edition of handmade items that represented American manufacturing heritage along with Japan's rich textile tradition," said Alley.