Fleischmann’s Yeast products are special strains of yeast that are chosen and cultivated for uniformity, hardiness, strength, stability and consistency. This in instant dry yeast comes in vaccum pack form, is easy-to-use and offers excellent stability and consistency. Yeast converts sugars found in dough into carbon dioxide, causing the dough to expand. This process is what helps give bread the soft and airy texture we all know and love! 1 lb. bag of instant dry yeast is perfect for making pizza crust, round loaves, dinner rolls, or long "French-style" breads.