These are great for when riding a motorcycle in cold weather.  The loose fit makes for easy on and off over regular clothing, and the full side zip on the legs is awesome for getting these on over boots.  I can ride in temperatures below 40 degrees F without getting that terrible ache in the knees.  The heavy canvas is perfect when your leg gets a little close to the pipes when riding in stop and go traffic.  I might have to look into getting a nomex patch sewn onto the inside of the right leg in the future.