The leggings are made of bamboo charcoal fiber, 100% goodquality ,we have test report by Chinese releated goverment. We getgood reputation in chinese market and 

American market. WE specialied seamed and seamless items ,mainly stretch textured yam and jacquard leg warmers.OEM ,ODM ,OBEare available. Any need ,email me anytime!Give me one chance ,repayyou a totally honest supplier.