Footwear manufacturer McRae Industries Inc announced on Tuesday that its military combat boot contract with the US Government has been extended by three months in a deal worth at least $6.2 million and as much as $13.1m. The North Carolina-based company said the contract extension is for a maximum of 216,000 pairs of boots and a minimum of 103,676 pairs consisting of the three current styles of direct moulded sole boots covered by the contract.