Outer cup made of ultra - light net fabric (air control ) Inner cup straps on the side to the skin and back lining made of high quality merino wool Wide panel also lined with merino wool Seams between the cups no seam allowances towards skin Flat band around the arm Merino wool is pleasantly soft and breathable - cooling in summer and warming in winter. This is why the combination of fabrics (tried and tested active net fabric on the outside finest merino wool on the inside) offers pleasant wearing comfort The first REAL merino bra on the market Straps throughout lined with stable inside padding Also lined with merino wool Adapts to the size range in 2 widths