Soy wax is a clean burning wax, which makes it an excellent choice for people who have trouble breathing and/or have particular breathing or respiratory issues such as asthma. Soy candles create about 95% less soot than regular candles and therefore will not discolor your walls with soot and ash that can originate in regular candles as well. As an added bonus, because soy candles burn so clean they are considered to be non-carcinogenic. Soy candles are non-toxic, which make them safe to keep around children and pets.