I purchased a pair of used Leupold binoculars off a site member. Took them to PA for the 1st day of buck. Long story short, I left them hanging on a branch and forgot them. Heavy snow covered the ground most of the winter and temps got down below zero. 4.4 months later I went back up for the trout opener. Took a stroll back to where i left them and found them on the ground. I thought they would be all fogged and weathered. Picked them up and took a look. As clear as the day I got them Only optics i will ever buy again are Leupolds! Well worth the money.