Are you looking for a cooling component that can be used just about anywhere? Milwaukee has the Cooling PVA Towel that can hang around your neck or anywhere else you see fit. All you have to do is soak it in water for 30 seconds, wring out the excess water, and use it until it dries up where you can repeat the process as many times as needed. You can get nearly four hours of cooling time, though if you have it in direct sunlight, it may be a little less. It is also machine washable and can block UV rays with a 50+ UPF rating.
You can preorder this cooling towel at either Acme Tools or Tool Nut. On both websites, it costs $10 for one towel or $80 for a pack of 10 if you need more or are buying them for a team of workers. Between the two websites, they state that these products are scheduled to ship between February 29 and March 15 — however, those dates are subject to change.