Manufacturer Defect; not covered under warranty. The sole on my boots split(see photo) with about 8 months of very light use. Keen refused to honor their 1 year warranty. There are multiple reviews on online stating the same issue. Pretty obvious its a manufacturer defect. The boots look good, and are comfortable enough. The do not breathe well at all, thus resulting in heat being trapped in the boot. If you're looking for a high quality, durable boot - this is not it, and don't count on Keen to cover any defects.