Tradable Long Fall Loafers
This cosmetic item was awarded to players who earn the Poker Night 2 achievement Personality Goes a Long Way.
This item is not tradable, however there is only 1 tradable instance of this item, most likely mistakenly granted by Steam Support.
Source
The Long Fall Loafers
Team Fortress 2 Level 86 Boots
These curved titanium shock-absorbers connect to the base of your spine and run down the inside of both legs. Now when you fall from a great height, the agony of impact will be absorbed, then conveniently redistributed to your whole pain-wracked body.