Italian 25mm mulberry silk handcrafted in USA. Double Layers of silks. One size fits most (fully adjustable elastic drawstring with silk ribbon through button hole on both side of cap allows you to fully adjust the cap to your level of comfort). Unique shape design which allows you to pull hair inside the cap without over-crowded so your hair can BREATH (especially if you have long hair). It comes with An Elegant Drawstring Bag .Machine wash in cold water delicate cycle