Consisting of a mask or helmet, re-breathers contain their own air supply and are designed to preserve the user in even the most toxic atmospheres. A character wearing a re-breather is immune to the effects of gases and can even survive underwater. However, re-breathers typically have air canisters that last for about one hour and then must be replaced. Replacing a canister is a Full Action. Replacement canisters cost 25 Thrones and are scarce.