Due to hazardous materials shipping restrictions, we do not sell IsoPro online. In-store only, these will not ship.
MSR IsoPro is a performance-boosting, 80/20 blend of isobutane and propane, with the purest isobutane (5% or less n-butane) of any canister fuel. This clean-burning formulation maintains higher internal pressure at lower temperatures than standard butane/propane mixtures, delivering superior cold weather performance and more consistent output over the life of the canister.
WARNING: Cancer and reproductive harm. Prop 65