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.

	16 oz / 450g	3.9 oz / 110g	8 oz / 227g
SKU	04589	06927	322100
Width (Standard)	4.4 in	3.5 in	4.3 in
Weight (Standard)	1 lb 7 oz	7.4 oz	13.1 oz
Length (Standard)	4.4 in	3.5 in	4.3 in
Height (Standard)	6.0 in	2.7 in	3.7 in
Country of Origin	Made in Korea	Made in Korea	Made in Korea