The Most Influential Gear of All Time: MSR Isopropane Fuel

1989

The first isopro fuel canister     Photo: Courtesy of Cascade Designs

ISOPRO fuel, a mix of isobutane and propane, revolutionized canister fuel because the fuels in the mix have different boiling points, which maintains the uniform vapor pressure inside the canister as it is drained or the temperature changes. The first canisters of Isopro fuel looked like hairspray.

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