Lights quickly - full flames in less than 5 mins and burns with robust flames for up to 3 hrs. Made with recycled and renewable wood sawdust and agricultural fibers, mixed with blends of wax and other combustible, renewable materials. Produces 80% less emissions than a similar duration wood fire. UL approved safety classification for use in UL-listed factory built fireplaces. Chimney Safety Institute of America Accepted Product. 6-pack 5 lb firelog case.