cover: 100% natural percale, 100% natural mulberry silk filling: 100% natural mulberry silk Since our factory has many-years experience in manufacturing silk products, ... good quality. Our material: white steam filature yarn, spun silk yarns, blending yarn, organzine, viscose yarn, staple rayon yarn ... jersey, thermal long johns, brief, panties, shorts, pants, scarf, silk quilt, bedding set, etc.