Mammut Mountain Pants I think I've worn these about twice, and I haven't used them roughly, so there isn't any major soiling. There's one stain on the seat, but I don't think it's very noticeable. (Please check the photos.) Made with high-quality 100% polyester fabric, these pants are durable and heavy-duty, yet also elegant. Plus, they're 2-way! The lower legs can be removed with a zipper! Silhouette: Straight Color: Beige