First and foremost please have your foot measured on a Brannock device. This is the device found at most shoe stores. Once you know your true size as measured on the device you will find that Bellville hot weather boots (such as the 600) run large. So if you measure 10.5 on the device Belleville suggests you order down at least a 1/2 size
The Belleville Mens Hot Weather Combat Boot are not waterproof. They feature a lightweight dual density sole construction with one third the weight of rubber and four times the shock absorbing properties. It also features (2) side air vents for evaporating moisture and cooling your feet.