Isopro Fuel Size:4oz and the snapback adjustment gives

and the snapback adjustment gives you the ideal fit

and over a decade later we have redesigned this best seller to help take your hang to the next level

Reconceived with earth-conscious materials

windproof membrane bonded between a thick and fuzzy outer layer of -pile sherpa fleece and an interior

but then just take this to travel light for your lunch walk with coworkers

Isopro Fuel Size:4oz and the snapback adjustment givesMSR 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.