When your operation takes you into the most rugged terrain, the QUEST 4D GTX FORCES 2 gives you the support and grip of a mountain boot, but still has the flexibility to take a knee or sprint to the target in tough conditions. Outsole: Contagrip MD Midsole: Dual density midsole, EnergyCell Chassis: 4D Advanced Chassis Upper material: Anti-debris Mesh, Full grain leather, Medial protective pad, Non-reflective materials, Protective mudguard, Single layer Mesh, Waterproof materials Upper Constuctions: Closed hooks, gusseted tongue, protective toecap, SensiFitMembrane: Gore-Tex Lining material: Mesh and textile lining Sockliner: Molded OrthoLite Lacing system: Lace locker, regular laces Anatomical fit: Standard Fit Height: High MIDSOLE TOE HEIGHT: 17 mm MIDSOLE HEEL HEIGHT: 29 mm DROP: 12 mm NORMS AND CERTIFICATIONS: ISO 20344:2011 - Puncture resistant sole ISO 20347:2012 - Oil and slip resistant outsole ISO NORM 2419:2012 - 2.0mm thick leather