Alcott Hill stretch denim. These are stretch type, so they are comfortable and fit the body well. They feel like they could be used for sports. Personally, I think they would also be good as golf wear. I haven't worn them much. They are size 48, so I'm listing them as a size L. The fabric feels substantial, so I think they will be fine for the coming season. ▼Product Dimensions (Unit: cm) Size │ L Waist │ 75 Width at Thigh │ 27 Leg Opening │ 19 Rise │ 23 Inseam │ 79 *Measured flat.