I sewed the pocket on one leg and photoshopped it to mirror onto the other leg to see how it would look.
When pockets are expanded:
Side view collapsed:
Side view expanded:
The straps run into the pockets to allow you to cinch down items that might flop around inside.
The cargo pocket can also be used to hold items when not expanded.
Came here to say this. Always hated pockets that hung alongside the knee. When full, the items interfere with bending the knee, and/or bang on it when walking, running or pedaling.