Keeping Cool in fursuit: The best way to keep cool is a cooling vest. Its worth investing in and will prevent heat exhaustion and greatly reduce the chance you'll sweat out all your body's hydration.
the EZcooldown vest is my favorite vest to use for keeping cool in fursuit. It uses Phase Change Material packs that get fully charged in the fridge or ice water in about an hour. Keeps its cool for about 2-3 hours of suiting. And there's a 59°F and 70°F versions of these packs. roughly $189 to ship to US. The downside is that it comes from the Netherlands and international shipping takes a very long time...
https://www.ezcooldown.com/collections/mascot-costume-performers-cooling-vests/products/complete-performers-vest
The other one is Techniche and they are from the US. So there is a good chance it will ship a lot faster to you. https://www.mycoolingstore.com/techkewl-phase-change-cooling-vest-blue.html?mainc=6626-Blue-L-XL&utm_source=google&utm_medium=cpc&adpos=&scid=scplp6626-Blue-L-XL&sc_intid=6626-Blue-L-XL&gclid=CjwKCAjw55-HBhAHEiwARMCsztmr6QYEvQpYem79HmNfW04rwa-5r6iXTbSEhkxzaGkd3Fkc1HswTBoC2HEQAvD_BwE
