93% Mulberry Silk + 7% Spandex Mid-waist Elastic waistband Detail: Back of the underwear is divided into three pieces. This design prevent underwear pulling on the crack, also it can avoid print embarrassment. LILYSILK silk boxers give you new options for selecting your underwear. Get convenience, comfort, and chic style all in new silk boxers. Provide almost everything you expect your underwear could offer, which are comfortable, breathable, and skin-friendly. Moreover, it makes you look great at any time.