Filled With A Highperformance Fourseason Fuel Jetboil Jetpower Canister Delivers High Vapor Pressure For Reliable Use In Cold Weather The 100g Size Is Perfect For Shorter Or Fastandlight Trips Features Premium Propaneisobutane Fuel Blend Delivers Optimum Heat Output And Performance With Jetboil And Other Brand Stoves Selfsealing Valve Allows The Canister To Be Removed From The Stove Burner For Transportation High Pressure Output Even In Colder Temperatures Stash This Small Canister Inside Your Jetboil Cooking Cup