Outer:65% Cotton 35% Polyester. Inner:100% Polyester. This is elastic waist,so we recommend the waist range. This is China size which is smaller than US/EU size. China Size XL = US size M(Waist 32 inches). Model height 178cm 70kg wear size XL. The size chart is for reference only. Due to different measure,may exsit 1-3 cm error,should be acceptable. In order to choose correct size,please contact our customer service. Our professinal customer service offers you suitable size advice.