Latex  20% polyester 80% <br />Adjustable 4 rows hook&eyes、high elastic free support. <br />Made from stretchable、breathable、and lightweight materials、seamless technology、no-trace、comfortable、suitable for all seasons <br />4 Spiral steel bone、which is the fins material inside the corset.It's flexible and durable、as soft as plastic bones、can bend easily but recover quickly to origin. <br />We ship it by ePacket、usually it will takes 7-15 business days.