MSR IsoPro 110g mens trail running shoes Double covered front zip flap

Double covered front zip flap

Sport Cap is not intended for use with hot liquids and is not leakproof

The paper varies and seems to be lighter on later editions

The crew length sits mid-calf to keep out dirt and debris

Wear them long in mild or wet weather for added protection

MSR IsoPro 110g mens trail running shoes Double covered front zip flapDescription 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. Features Improved Performance: 80 20 blend of isobutane and propane