The Arbor Element's balanced design provides the versatility needed for the true “ride-it-all” experience. The Element freely initiates into any spin or line alteration, holds a solid edge at speed, in the steeps, and through the pipe, and delivers real all-season performance. EcoTechnology Koa Wood Topsheet. The sustainably harvested wood top creates a 3rd composite layer that adds structure, making the board stronger and more responsive. Koa, or “warrior” wood, is prized for its rich colors and unique grain patterns. Native to the Hawaiian Islands, this remarkable wood was first used 1,000 years ago by the Polynesians to build the original surfboards.