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.
Width: 4.3 in (11 cm)
Length: 4.3 oz (11 cm)
Height: 3.7 in (9.4 cm)
Weight: 13.1 oz (0.37 kg)
Country of origin: Made in Korea