1) Bamboo/Combed cotton blended yarn 2)Siro and Ring spun 3) ratio:30/ ... /80,50/50 ,etc 4)21s,32s,40s,etc Bamboo yarn Feature:1.main Function : (1) releasing negative ions ; ( ... charcoal fibreBamboo charcoal fibre/Modal40s 10/90siroBamboo charcoal fibre/Modal40s 20/80 siroBamboo charcoal fibre/Modal40s 30/70siroBamboo charcoal fibre/Modal40s 10/ ... .Color:Grey,black ,white, 32s/1 Bamboo Cotton yarn