I own quite a few MBTs and when I saw the GOTI I was excited to finally see a MBT boot with style. Sadly the zipper up boot is made for a childs calf. The leather going up the leg to the calf is narrow. The zipper goes all the way up to the top of the boot and then has a click lock strap (not adjustable) to finish it off so if your calf is wider than my 9 year old sons then it wont fit. When I saw the click lock strap I figured that I could adjust the width around the calf but that is not the case. Its one size fits all.