10oz Japanese duck canvas woven on vintage shuttle looms in a tightly woven plain weave construction.
Number one choice for “on the job site” wear", although it looks pretty damn good everywhere else too.
Duck is a tightly woven cotton that is more resistant to ripping, snagging, and tearing.
Jeans were actually originally made with duck canvas until the famous switcheroo with Levi Strauss in the 1800’s.