How did these work boots survive 4 months of rugged conditions?

One of the most common requests I get are for extreme duty boots. And in my opinion it doesn't get much more extreme than this.

The KEEN utility Philadelphia work boots feature
-Left/right asymmetrical carbon fiber toe (15% lighter than steel)
-KEEN.DRY waterproof breathe-able membrane
-Oil and slip resistant rubber outsole, ESR (electrical shock resistant) also resistant to high temps 572° F/300° C
-90° Heel (provides stability, locking boot in rough terrain, climbing ladders)
-Chemical resistant leather
-CSA certified