FST = Fit + Superior Traction. Merrell’s new addition to the Moab range has reduced weight and athletic design features for faster, more agile trail exploration. This low-rise men’s shoe is ideal for moving speedily. lightly and with stability across all kinds of terrain. GORE-TEX membrane ensures complete waterproofing and breathability, whilst a leaner midsole strips away a lot of the bulk. A Vibram Megagrip outsole maintains the high level of traction on trails or mountains.