ALTRA. AL0A4PE5000. MENS LONE PEAK 4.5. BLACK. The updated version of our original trail shoe features a trimmed down layer that offers added flexibility and comfort and a simplified lacing system for improved micro-adjustment. Like all previous versions the Lone Peak 4.5 includes all of the Altra trail shoe must-haves like StoneGuard MaxTrac Balanced Cushioning and the FootShape toe box. To top off the update the midsole foam formula has been tweaked just enough to give you a more resilient feel underfoot.