
5 Rules to Beat 90°F+ Weather
A lightweight UPF 50+ polyester sun hoodie blocks 98% of harmful rays while mechanical air permeability cools skin through movement.
Cotton traps up to 27 times its dry weight in salty sweat, causing severe chest chaffing and collapsing evaporative trail cooling.
Soaking a buff or bandana in cold alpine creeks cools blood circulating through carotid arteries, drastically reducing core thermal strain.
Read the full 9-point hot-weather clothing guide with fabric breakdowns, UPF ratings, and anti-chafing protocols.