Patented in 1902, bread flour is a high-protein flour that typically contains between 12 and 14% protein, and is designed for baking yeasted breads. It is worth noting that the high protein content means that bread flour has more gluten in it, which makes the dough more elastic and light, and results in a chewy and airy texture when baked. Bread flour is also set apart from other types of flour because it requires significant kneading to create a good gluten structure, which results in the airy and chewy texture.