MicroTECH™ Sour/Soft is a hyper-concentrated formula that provides the most effective and economical results where a combination sour and softener product is preferred. This unique Sour/Soft formulation has the ability to inhibit iron deposits, reducing the need for separate sour and softener. Formulated with optical brighteners, microTECH™ Sour/Soft leaves towels, sheets and fabrics looking bright as new.