Using high-tech breathable mesh back retardant material or fabric, seat hemp imported environmentally friendly flame retardant flannel material, inner 45KG / cubic meter density foam, the tensile strength of not less than 85Kpa; imported green glue, collage tight smooth. Imported pneumatic pump, multi-position reclining mechanism to synchronize, split back and seat, high-quality nylon five-star foot, PU armrest, seat comfort and ergonomic.