Cargo pants - are made of hard wearing fabric and ruggedly stitched!

Cargo pants (cargo trousers) are loosely-cut pants designed for tough, outdoor activities distinguished by multiple cargo pockets.
A cargo pocket is a form patch pocket with accordion folds for increased capacity closed with a flap secured by snap, button, or Velcro common on battledress and hunting clothing.
Cargo pants are made of hard wearing fabric and ruggedly stitched. Increasingly they are made of quick-drying sythetic or cotton-synthetic blends, and often feature oversized belt loops to accommodate wide webbing belts.
The garments are characteristically designed to allow bending at the knee and hip and sewn with felled seams.