I purchased this pair of insulated Patagonia pants for use in snowcamping where I was a Sierra Club teacher for family snowcamping. Purchased in about 2014 and used for two seasons. Always kept clean and recently washed for your use. Very warm in Sierra Mountain winter conditions. I "upgraded" after two seasons to a gortex insulated pant as a personal preference so I did not have to bring along rain pants as well when the weather turned rain/snow combination. The Patagonia pants really works well; side zips are great when on the trail when it gets hot; easy to get on and off. Since I teach families about mountain travel, this includes taking care of your gear; hence the pants are in great shape. Rodger Faulkner .