upholstery         
noun [ U ] uk/ʌpˈhəʊl.stər.i/ us/ʌpˈhoʊl.stɚ.i/
 坐椅面料;坐椅填充料
the cloth used for covering a seat and/or the substance used for filling it
  an old sofa with faded green upholstery 面料褪了色的绿色旧沙发 
  装饰坐椅
the activity of upholstering objects