96% Cotton / 4% Elastine Bedford Micro-Dobby Stretch Pants with 60% Cotton. 40% Oystex (Recycled Polyester) liner. The Flanstones are exactly like our Bedrocks. only 10x warmer. They feature denim-style pockets and hardware. rivets at all stress-joints. back waist leather label. heavy-duty railroad button. fly closure. and custom labeling.