03 BUYING NOTES
Check how trousers move at the knees
If you often kneel or crouch, check how the trousers are cut at the knees. Pre-shaped knees follow a bent leg. An extra fabric panel between the legs can give you more room to move.
Ask for a side photo of the knee and a close view of the inside seams. The listing may call the knee shape articulated and the extra panel a gusset.
Carhartt example of shaped knees and a gusset