Black Silk Bra. Silk is a Light-weight, Non-stretchy, fabric. Fabric 1: 100% Silk, Fabric 2: 100% Silk ; Straps 100% Elasticated Cotton. Layered triangle cup bra. Bra ties at neck and back. Adjustable straps. Fully lined. Fits true to size. Medium coverage. Hand-Wash or Dry Clean. Model is 183cm and is wearing a size XS.