I bought one from HD a few years ago while in New Mexico. It worked friggen awesome in the heat with a leather jacket and a ff helmet. Last year it was 115 going thru the desert in ca/az, this time I brought a camelback, soaked it in the ice chest and used the vented jacket this time, it lasted almost 2 hours but Ill never go on a summer trip again without one. It may be time to get a new one by now.