ComfortPro’s Microflex Insulated PEX has the highest R-values available while saving labor with a flexible design and construction. Delivering energy with minimal loss compounds savings throughout the life of the system. ComfortPro’s PEX-A pipe is the heart of the system with multiple layers of waterproof closed-cell poly foam insulation inside a double-wall corrugated HDPE protective casing. Microflex is suitable for use in heating, sanitary, commercial and industrial piping applications.