Men's AltraA(R) King MT 1.5 Trail Running Shoes :: The AltraA(R) King MT 1.5 is made for runners who embrace mud, rocks and burly mountain climbs and has made its mark as the quintessential king of the mud. This update features a new upper with reinforced mesh and enhanced drainage features. The Foot-Lock(TM) trap s been adjusted for increased comfort, and the neoprene inside the heel is softer and more secure.