I have a difficult to fit foot and need for wide toe-box area. These boots in 10.5 W fit me perfectly when no other has. They are light-weight yet extremely comfortable. I have worn them on all day-treks through trails in Iceland (in Summer), and elsewhere and taken then in rain , waded across rivers in them and found them to be 100% waterproof as advertised., keeping my wool socks completely dry. Tread and sole are very rigid giving a strong sense of stability and security when moving in difficult places or terrain. I have had a few boots and tried many much more expensive boots. I got these 2nd hand through Amazon Warehouse for a steal, and they are by far the best boots I have every owned. They are not too hot, they breathe, but they are not insulated, so not free extremely cold climates. I would not venture to think they would be good for that. But for everything I would do that is semi-hard core, they are awesome. After weeks of daily pounding, mud, water rain, snow, ice, rocks and trail, they hardly look the worse for the wear. I did get the Skechers water protector spray for an extra level/barrior of protectant since I was in the rain and water daily with these things.