Build your ultimate outdoor oasis with environmentally certified MicroPro Sienna so you can rest easy knowing your project will withstand the challenges thrown by Mother Nature. The wood is treated using patented MicroPro micronized copper azole (MCA) which provides protection against rot, decay and termites without any of the solvents used by traditional pressure treated wood products. MicroPro Siennas signature rich warm brown tone enhances the wood grain and provides a beautifully finished look to decks, pergolas, fences, docks and any outdoor build youll be proud of for years to come.