1Auditorium chair with wood shell of seating and backrest 2. mould cold foam upholster fabric or leather to be cushion of se Detailed ... , Stadium,Sport,Arena,bleacher, Platform,stand and Grandstand. : 1. seat outer cover and back outer cover are made of injection ... polyurethane) foam upholstery with fabric or PU artificial leather.3. PU foam density:55kgs/m34. Tip-up seat. fold up seat.5. Armrest ...