Purina's Wind and Rain(R) All Season Minerals are available as a comprehensive line of beef cattle minerals designed to address the mineral deficiencies of the available forage, in a palatable, weather-resistant, granular formula. Wind and Rain(R) Storm(R) cattle minerals' large particle size and special formulation keeps the mineral from absorbing water and blowing out of the feeder. Exclusive Storm(R) technology provides the ultimate in weather resistance to reduce waste and makes Wind and Rain(R) Storm(R) Formula more economical to feed than conventional loose minerals. | Purina - Wind and Rain Storm Formula All Season 7.5% Complete | Size 50 lbs