These are Sorel Caribou boots. I purchased them about 10 years ago. After purchasing, I used them once for a snow camping trip. After that, they were stored at home, and I only used them for commuting in winter for the past 5 years or so. As you can see in the photos, they have a considerable amount of wear, but their waterproofing and insulation have not deteriorated, and I believe they are still fine to wear. Please only purchase if you understand that these are used items.