Whiteriver Composite Decking is manufactured using a wood and HDPE mix, creating a revolutionary composite of improved, user-friendly material that out performs other traditional pure wooden and plastic materials. With no need to be stained or sealed, you save time and money now and in the future. Our Arizona decking inherits its name from the popular American State. Home of the Grand Canyon, a mile deep chasm carved by the Colorado River. This reversible board is both beautiful and resilient and allows you to choose between a ribbed or grooved surface making it the quintessential deck of choice for the connoisseur.