Amazing boots that are 100% water proof and fleece lined. Not to mention lots of extra bells and whistles like bioDEWIX T™ antimicrobial footbed insert topcover withNZYMM for odor control and moisture management and flex-foam neoprene. Approx boot height: 16.9"Approx calf circumfrence: 15"Temp Range: -40F to 40FI am a person who always has cold feet and these boots are my new found love. I accidentally ordered two pairs and that's the only reason I'm selling them. They will come in an unopened box from the Muck store.