Mithril gauntlets are a reward that can be purchased with tokens from the Fist of Guthixminigame. They DO NOT degrade with use like barrows equipment, unlike other Fist of Guthix rewards. They instead come in "charged form" and lose their charge when you die wearing them or you can take them to Reggie at the fist of guthix and he will uncharge them for you. They can be recharged for 17 Fist of Guthix tokens. They can only be traded when completely uncharged and require 30 Defence to wear. Buying these from Reggie and selling on the Grand Exchange currently provides 1034 coins per token.