These boots are the BEST! I had a pair last winter and I wore them EVERY DAY! The best part is that they are NOT lined but have more room inside than most Keen shoes so you can wear a thicker sock IF YOU WANT. Personally, I like being able to CHOOSE!!!! If I want to go out and keep my feet warm, I can wear a thick wool sock. If I am stuck in the office for the day or just wear them out shopping or to dinner - I can wear my usual thin Smartwool socks and MY FEET DON'T SWEAT from wearing heavy boots indoors! They are light weight, you can WALK FOR MILES IN THEM, AND they look pretty cool, too - so many patterns. BONUS: THEY ARE WATERPROOF!!!