+1 on the Matterhorns, wore them the last 4 years of service here in Germany and even by -18C they kept the feet warm with good socks. They were resoled twice due to wear and tear in the field and could take punnishment. As long as you dont close the pores when cleaning they stay waterproof.
And Andy is 100% correct with the comfort, like walking on pillows but tons of support.