my Summer shooting attire is heavy duty nylon fishing shorts, boxers, nylon long or short sleeved cape back (open) flats fishing shirt (short sleeved if the range has shade) open weave top brimmed hat, sunscreen on my face and arms (with the short sleeved shirt)... one of the water absorbing gel bandanas in my cooler if needed...I find a tremendous difference in evaporative cooling with the nylon compared to cotton....wool blend socks, synthetic New Balance shoes

for casual wear, the nylon shorts, and polypropylene (UnderArmor type) moisture wicking shirt

for EGR, I've been using a sports drink formula from the internet using lite salt (potassium chloride source), regular salt, and sugar, but with the amounts reduced for the .5L water bottles I find convenient to use

a golf sized umbrella on a PVC pipe is a tremendous help