1.Top quality,Nice looking 2.Metal,FRP,Carbon frame with Memory foam 3.Cloth or PU or Leather cover 4.Single or Double slider 1 seat details high elasticity memory foam strong durable and abrasion resistant cover strong and durable carbon/fiberglass 90% product made by hand2 alternative parts frame material optional: fiberglass, carbon fiber, metal. over material optional: PVC, PU, suede, cloth, ...