Black, smooth-fabric gaucho pants with an elastic waist for comfortable wear. - Color: Black - Style: Gaucho Pants - Waist Design: Elastic Waist - Material: Smooth Fabric - Silhouette: Wide Silhouette Thank you for viewing. These pants are lined and not see-through. The size is S, but the back waist is all elastic, so those who usually wear M size can also wear them. The length reaches the heel for a person who is 160cm tall. I have worn them about twice. Please understand that these have been stored at home before purchasing.