In case you weren't already completely clued up about your denim, we've a little information for you about those tiny bits of metal on your jeans.
You know the ones, they're usually spotted lurking at the corner of your denim's pockets.
It turns out that they're actually little rivets.
Much like in construction, where rivets would be placed at joins and points of tension to help bolster the material against pressure or strain, so the little rivets on jeans are placed to help the fabric cope with the same sorts of tension.
On jeans, they'll be placed at points where the denim is likely to suffer the most from pull and movement.
The history of denim jeans is really interesting.
Double denim might be on-trend currently, but these trousers certainly weren't invented for purposes of style.
Whether on builders or farm workers, jeans are primarily a labourer's trouser.
As we wrote about a few months ago, the small pocket on your jeans was invented for cowboys to use while in the saddle.
So it makes sense that jeans, which were so often worn by people moving about in rough terrains, might need a little extra construction.