Product Intel: M-FLEX 8 BUILT FOR SUPPORT: Ruck harder, breathe easier with our best all-around boot. Conquer any terrain with OTB's M-Flex 8. Compliant for U.S. Army Wear with MultiCam® & OCP and U.S. Air Force Wear with OCP. Best For: Field Operations • All-Terrain Performance • Optimal Support Underfoot • 40-50+ Pound Rucks • Traction in Mud & Snow Features: >> Meets current regs for AR 670-1 and AFI 36-2903 >> High rebound comfort performance PU midsole >> Removable performance INSITE® Contoura® PU Footbed >> Full-length internal molded polypropylene support board for stability and support under heavy loads >> High abrasion GRIP-STIK-FIELD rubber outsole compound for unsurpassed traction in all conditions Performance Upper System: >> Weight per pair (based on a size 10): 1.8 pounds >> Heel to Toe Drop: 6mm >> Full air mesh lining for 360-degree air circulation, combined with laser-perforated tongue for unmatched breathability >> 1000D quarter panels combined with perforated ankle supports for breathability >> 8" split grain flesh out waterproof leather for faster drying time >> Strategically placed non-metallic drainage ports evacuate water in just a few steps >> NATO Rust-proof speed lace loops for quick lacing with field-proven durable round laces