Never drink Gatorade or other stuff when really hot like 40 degrees I just have bottles of frozen water and drink this all day. I also use a wet scarf around my neck and shoulders otherwise just lots of water. Some people use wet vest and can work all day with these. I usually pull the pin at about 1.30 EDST and then go back about 4.30 to finish the day off at about 6.30 or 7