The boots are water proof, extremely light and the rubber/foam material is keeping your feet very warm, so I never needed thick socks on a cold weather , unlike with any other traditional rubber wellies. until now! I got my normal 9 medium size that I get for nearly all my other shoes (except Merrill Moab, where I get a 9. This is a great idea but, in practice, the headphones added white noise as well as background noise. I live in Scottsdale, AZ and the first one didnt make it through the first summer in my garage. Very durable material! I bought my first pair in July of 2015! 5, in Sketchers, Im an 8. They will be fine for when Im lounging in the house. I just love these sandals , great fit !