Lights fully in less than 5 minutes. Burns for 3 hours*. Duraflame fire logs are made with wax and a blend of recycled and renewable biomass fibers+. Burns Cleaner than Wood. Duraflame firelogs light faster and burn more completely than firewood, and because far less material is consumed when burning a fire log, significantly fewer pollutants are emitted than a comparable wood fire. 80% less fine particles** 74% less carbon monoxide**90% less hazardous air pollutants** Saves Trees. Duraflame fire logs use recycled wood and agricultural fibers, saving valuable natural resources. A duraflame fire log consumes 80% less material than a comparable 3-hour wood fire, and burning fire logs instead of wood results in significantly fewer trees cut down for use as firewood. America's #1 Fire Log Brand The Bigger Brighter 3-Hour* Log Burns for 3 Hours* Fast Lighting Burns Cleaner than Wood UL Classification Mark