I own and operate a small fire hose testing business. We work in heat indexes of up to 105 and humidity levels in the 90s. Our work sites are parking lots with no shade, and our average day includes 12 to 14 hours of physically demanding work. After about 7 hours we need all the help we can get and 5-hour ENERGY® is the only thing that helps us finish our day. Thanks for a good product.