This is a poorly insulated boot on the bottom of all places. If you want to use this in very cold temperatures (even as a camp boot) you might want a insulating insole. However, freaking awesome design otherwise but could use a thicker, more durable zipper as I'm sure it wouldn't hold up for long term use. For the price and the brand not bad, but the design I think could use improvement, especially the thinner soles (its weird having warm ankles and cold soles).