Artist Tom Sachs learns best by testing. His New York studio is the first true urban wear-test center in Nike history. And his experience with the Mars Yard 2.0 led to the new Nike x Tom Sachs Mars Yard Overshoe. Its name comes from the Nylon-reinforced Dyneema outer "bag" that can be rolled up in nasty weather, but released and rolled down once inside to let the inner shoe breathe. It also has a new tread pattern with small siping for dealing with wet conditions, and Fidlock magnetic buckles for a secure fit. Available at DSM London today, with a global release to follow.