The primary attractant for all blood seeking biting insects is Carbon Dioxide (CO²) which we breathe out.
Secondary attractants are Octenol (1-octen-3-ol) and Lactic Acid.
Everybody produces lactic acid in their sweat.
When Octenol & Lactic Acid is combined with Carbon Dioxide the attractant rate is increased dramatically.
Click here to see chart
Mozx supplies Octenol & a combination lure containing Octenol combined with Lactic Acid.