For unsurpassed warmth and protection in extreme cold conditions, check out this Arctic Storm neoprene insulated boot by Dryshod. 

• ARS-MH-BK
•  – outer and inner grip
• 6 layers of protection plus EVA cold-blocking midsole = 7 layers
• 5.5 mm bootie 2.5 mm DENSOPRENE XD foam (extreme density) for extra protection 2 mm airmesh 2 mm warm fleece lining = 11 mm of insulating warmth and protection!
• Removable molded EVA sockliner
• Double achilles heel and instep reinforcement for comfort and protection
• Nylon shank