MSR IsoPro is a camping fuel mix that contains 80% isobutane and 20% propane. The fuel blend has the purest isobutane of any canister fuel with less than 5% n-butane. This special mixture helps ensure your canisters maintain high internal pressure and continue to perform at low temperatures.
USDOT regulations require camping fuel to be shipped using surface methods (trucks and boats) only. We ship all in-stock orders within one business day.