When you are stocking up on breadmaking supplies, don't forget the all-important yeast! This is instant yeast, meaning you use less than regular yeast, and add it to the flour (rather than having to dissolve it in liquid). No need to "proof" this yeast—just let it rise just once right in the bread pans and bake. One bag lasts me through hundreds of loaves of home-baked bread. Once opened, I store mine in an air-tight container in the freezer and it stores for years. One pound bag, vacuum packed for long-term storage.