5 Pound bag of Proof's custom bread flour that gets used in the production of local sourdough. Months of testing various heritage grains together at different levels went into the original formula, which is 51% whole grain composed of locally grown wheat. Within that majority is White Sonora, Blue Beard Durum, some locally grown Hard Red Spring, and a touch of Malted White Sonora. The flour is milled locally on stone at Hayden Flour Mills. It is suitable for bread, pasta, viennoiserie, and any dough in which strong development is desired. Protein level is high at about 11.5%. This flour blend has a strong white, unenriched bread flour as the base 49%.