I have worn the boots in near freezing temperature several times. The boots is definitely warm and made well. The workmanship and the materials are first class comparing to some cheaper model. I think the size with the insulation layer in the boots should be one size up for a comfortable wearing. The boots is sort of heavy and clumsy in regular walking. But I think that it is made for snow walking or in icy areas. It is definitely stable and serves its purpose well. I definitely recommend it for that use but not for hiking or climbing.