These are pants from Next. I believe the fabric is cotton, but I'm not entirely sure. It's not a stretchy fabric. It's thin, so you can wear it in seasons other than winter. The waist is elastic, and the drawstring can be tied or left untied. Please feel free to ask if you have any questions. Color: Black Pattern: Solid Pant Length: Cropped / Mid-length Material: Cotton Waist: Elastic / Drawstring