Mountain Khakis Men's Flannel Original Mountain Pant Relaxed Fit 10.4 oz Duck Cotton Canvas, 5oz flannel lined 10.4 oz Duck Cotton Canvas and 5 oz. flannel lined Triple Needle Stitching throughout the entire pant YKK Brass Zipper, Riveted Metal Button and Bar Tacks in all key stress areas Action Diamond Gusset for superior comfort & range of motion Grosgrain Waistband ? prevents the waist band from shrinking or stretching