The 5.11 8" A.T.L.A.S. Side Zip is a performance boot built from the sole up to increase performance. The All Terrain Load Assistance System is a force multiplier for those who carry heavy weight on long shifts. This boot is constructed of nylon with high abrasion air mesh, a water resistant leather upper, and because so many arduous jobs demand it - a polishable toe. Additional features include a YKK side zipper and a locking ankle eyelet, and a high traction outsole so you can take those corners in a foot pursuit or run headlong into whatever challenge you're up against.