It's like denim, but it's definitely not average.  The blue canvas fabric has horizontal stripes created from the diagonal stitching that mimics the texture of traditional denim fabric.  The stripes alternate dark blue with light blue and are set equidistantly.  

• 50 yards (150 feet) long
• 1.5" wide
• Light-bodied canvas
• Wired edges with denim blue stitching