The Arbor Roundhouse is designed to perform in any terrain, feeding the ride-it-all addiction with an energetic narrow-board feel. In the park, powder, trees, steeps, and groomers - the Roundhouse delivers powerful return, improved spin and edge-to-edge initiation, a light, floater-style ride, and big-time durability. EcoTechnology: Bamboo Topsheet. Bamboo is an amazingly renewable, environmentally friendly material that's incredibly strong; yet light, flexible, and resistant to compression. The carbonized bamboo top creates a 3rd composite layer, adding structure for significantly improved return and resilience.