1.Material:Rayon,Polyester 2.Type:300D/1,450D/1,600D/1, etc ... fastness Material: Rayon, PolyesterSpecificatuon: 300D/1, 450D/1, 600D/1, etc. Product Characteristic: The embroidery thread is using super quality viscose filament yarn ... .Usage: Computerized embroidery, nameplate embroidery, lace embroidery, braided fabrics ect. Viscose Embroidery Thread