The Warm Doublet is a special piece of clothing that provides unlimited protection from cold weather status effects. Go to the Old Man's house south of the Temple Of Time in the Great Plateau. At the southern edge, read the diary inside the house with the cook pot outside. The diary describes a special recipe for "Spicy Meat and Seafood Fry". Cook this recipe, then talk to the Old Man, saying "I cooked something" to get the Warm Doublet. The diary does not reveal the Spicy Meat and Seafood Fry recipe. To cook it, you need the following ingredients: Spicy Pepper, Raw Meat, and Hyrule Bass. Spicy Peppers are found in the southern region of the Great Plateau. Look near the Old Man's house, or growing on the path up to the River Of The Dead. Raw Meat drops from wild boars in the Forest Of Spirits. Crouch and sneak close, then carefully aim an arrow to kill them with one shot. They will run away if they detect you. Hyrule Bass are found in the waters between the Great Plateau Tower and Oman Au Shrine. Swim toward them from the deep and herd them toward the beach to trap them. After collecting the items, select the ingredients from your inventory and place them into a cooking pot. There is one located outside the Old Man's house. After creating the recipe, speak with the Old Man to get the Warm Doublet. Equip the flimsy armor to explore the Mount Hylia region without taking damage from the cold weather.