Here is a link to sizing information provided by Fly Racing
Fly Racing Boulder SympaTex Boots
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$229.95
*Features*
* Sympatex waterproof breathable membrane
* 600g thermal insulation comfort rated to -40
* Durable rubber sole to minimize wear against running boards
* Molded rubber toe and heel cap for strength and durability
* Slip resistant rubber outsole for exceptional traction
* Dual stitched paneling for extra durability
* Removable gel insole provides all day comfort
* Additional insole insert creates customizes sizing
* Pull straps on both front and rear of boot
* Tall design provides greater comfort, stability, and protection