I was looking for an extremely comfortable, very warm, versatile and durable boot. I read the reviews and I also have slightly larger calves due to exercise so even though ordered from overseas I felt confident this would work. The customer service advised on size (a little extra room due to the lining). And, they are awesome. The only thing a little unusual is the zip at the heel and the back of the leg. It feels a little strange because you are aware of it inside the boot at the back of your heel l but I plan to wear thin socks so this wont be an issue. The quality is better than I expected, very comfortable, and well made. I expect these will last for years.