Can a boot so soft and lightweight be 100% Waterproof?? These Baby Bogs prove that YES they absolutely can. Made from 3mm Neo-Tech™ insulation they are not only waterproof they are cozy keeping little toes warm down to temperatures of 14°F / -10°C. They are soft and flexible making them easier for little ones to play than regular wellie boots and with easy on handles they will love their independence with the Baby Bogs. Kids can be kids in these fun boots, don't worry about them getting muddy as they are also machine washable.