MSR WindBoiler Personal Stove System 100 primary air combustion, enclosed design and internal pressure regulator work together to offer windproof performance and make the stove virtually impervious to outside conditions Radiant burner and enclosed, windproof design allow the stove to boil water fast and operate in cold, windy conditions Radiant burner and heat exchanger deliver faster boil times and more fuel efficiency than competitor's conventional stoves that use convective heat only All the oxygen the stove needs is drawn in through ports near its burner, allowing the pot's heat exchanger to protect the flame and maximize heat Integrated cookware with built-in heat exchanger transfers heat to the lock-on pot