South yard: L4XL6XXL6XXXL4 North yard: XL 5 XXL8 XXXL7 20 boxes per small case, 120 boxes per piece 95% regenerated cellulose fiber 5% spandex Bamboo pulp fiber is a kind of regenerated cellulose fiber which is extracted from bamboo and manufactured after processing. It is an ideal textile material and combines with spandex to make it healthy and skin-friendly. Bright color, tenacity and wear resistance, soft and smooth, sweat absorption and moisture removal, make wearing comfortable and natural.