In Grounded, Sizzle Protection is a resistance stat that shields adventurers against Sizzle, a harmful status effect that gradually fills a Sizzling meter on the UI while producing a sound similar to when something is burning on a frying pan. Once the Sizzling gauge reaches its max, red heat waves will appear at the bottom of the HUD, and the affected individual will see their HP quickly drain away. Eventually, Sizzling players will meet their end if this status effect is left untreated.

https://screenrant.com/sizzle-protection-equipment-unlock-grounded/