Under Armour Micro G Valsetz Zip - Black is the next generation of the Valsetz. The outsole has been upgraded to a durable Oil and Slip resistant rubber compound and the upper design is cleaner, with fewer unnecessary materials, and abrasion resistant were you need it. Three key improvements in comfort. Under Armour upgraded to the new Micro G foam midsole, increased breathability in the upper for great hot weather or indoors comfort, and added an anti-fatigue polyurethane footbed for all day comfort underfoot.