The RipStik caster board is like surfing or snowboarding on dry land. The RipStik’s 360 degree inclined casters and pivoting deck move the rider forward with a unique twisting motion without ever pushing off the ground! Deck: High-tech polymer with removable deck plates Platform: Slip-resistant concave, pivoting deck Torsion Bar: Rubber padded steel Wheels: High-grade urethane on inclined 360 degree casters Age: 8+