I purchased the 1405 socks
I purchased the 1405 socks as part of the warranty process which I was using for a pair of 1466. The warranty process allows you to buy any pair of DT socks with the credit you receive for the old pair (you have to pay the difference of course) and I chose to upgrade to a full boot sock which I find more useful for serious walking.
The warranty process is reasonably straight forward and provides some comfort against the relatively high price you pay for DT socks, the rest is done by the socks themselves.