The positives first: The boots fit well (1 number ordered one size larger!), Looks very pretty and is quick on and off. As expected! Another advantage: The boot is quite high, therefore also suitable for "larger mud". Unfortunately he is not here often advertised Thermo skills with me. After a few minutes I have at -2 degrees cold feet (although he claims to Super sole and despite thick socks). The cold creeps from below into your feet into it. Even with thermal insoles remain my feet did not really warm. Conclusion: The thermal capabilities do not extend into the negative range. At least my expectations were therefore not fulfilled.