M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
M-FLEX 8
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M-FLEX 8

$180.00
We proudly offer a 10% Military Discount to Active Duty Military, Veterans, and First Responders • Verified by SheerID
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Made in Cambodia

Ruck harder, breathe easier, and conquer any terrain with our best all-around boot.  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

  • 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
  • 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

We offer multiple shipping options to get your boots to you as quickly and reliably as possible. See below for details on rates, delivery times, and availability.

1. Standard Ground Shipping

  • Service: UPS Ground or USPS
  • Available To: Continental U.S., HI, AK, PO Boxes, APO addresses
  • Cost: Free with any order
  • Processing Time: Ships in 1-2 business days
  • Delivery Time: 3-5 business days after the shipment date

2. UPS 2-Day Shipping

  • Available To: Continental U.S., HI, AK (Not available for PO Boxes or APO addresses)
  • Cost: $25.00
  • Processing Time:
    • Same-Day Shipping (Mon-Fri): Orders received by 12:00 PM EST
    • Next Business Day Shipping: Orders received after 12:00 PM EST
  • Delivery Time: 2 business days after the shipment date

3. UPS Overnight Shipping 

  • Please Note: we do not ship overnight orders over the weekend, as our warehouse is closed on Saturday and Sunday.
  • Available To: Continental U.S., HI, AK (Not available for PO Boxes or APO addresses)
  • Cost: $50.00
  • Processing Time:
    • Same-Day Shipping (Mon-Fri): Orders received by 12:00 PM EST
    • Next Business Day Shipping: Orders received after 12:00 PM EST
  • Delivery Time: 1 business day after the shipment date

Please note that delivery times are estimates and may vary due to weather, carrier delays, or other unforeseen circumstances.

For any questions regarding your order or shipping options, please contact our support team at customerservice@otbboots.com

Need help?

Our customer service team aims to provide a first-class experience for every customer. We are available M-F 8am - 5pm CST. customerservice@otbboots.com

Learn more about our warranty

Deep Intel: M-Flex 8

Watch the video below to hear the full product story from OTB Founder, Dan Ellis.

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