The rubber exterior is very durable and will not tear even in harsh environments. It is completely waterproof, preventing snow, ice, and water from entering. The removable inner lining has excellent moisture-wicking, heat-retaining, and insulating properties, preventing sweat from building up and keeping your feet dry and warm at all times. The inner lining is easy to remove, so even if it gets damp, it can be easily dried. Regular drying will maintain its heat-retaining effect. Your feet will stay warm not only during snow mountain activities and outdoor work but also when fishing or other activities where you don't move much. Baffin is a popular Canadian outdoor equipment brand in North America. I wear a 26 cm, but I think it would be fine for someone who wears a 25 cm if they wear thick socks. I bought them used, but they were overkill for my needs and I didn't have many opportunities to use them, so I'm selling them. USA 10 UK 9 EUR 43 CM 28 #Baffin #WinterSports #Climbing