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M-Flex 8 Winter

$220.00

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

Made in Cambodia

Product Description

**AVAILABLE NOVEMBER 2026**

The Flex 8 Winter is AR-670-1 and AFI 36-2903 compliant. Designed for athletic comfort and performance, it features a leather upper, a 100% waterproof membrane, and 400g of insulation to deliver heavy-load stability and traction in tough conditions.

Best For

For military personnel operating in wet, arctic conditions who require a reliable foundation, warm feet, and durable traction under heavy loads.

Materials & Specs

• High abrasion GRIP-STIK FIELD rubber outsole
compound for unsurpassed traction in all
conditions.
• 100% Waterproof upper construction utiliz-
ing our HydroGuard® waterproof membrane.
• 400g Thinsulate® insulation provides an
extra level of warmth in Arctic conditions.
• 1000D quarter panels combined with 2 inch
nylon webbing ankle supports.
• 8” split grain flesh out waterproof leather for
faster drying time.
• NATO Rust-proof speed lace loops for quick
lacing with field proven durable round laces.

• 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.

Shipping and returns

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

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M-Flex 8 Winter

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