Protection and comfort
If you ride "off the tarmac", then at some point your tires will slide in an unexpected way. When you slap the ground with your foot, and you will, you need ankle support, and a solid sole. I have used a pair of Sidi Discovery boots for about 60,000 miles. They are comfortable and fairly light, they have also held up very well. That peculiar model is no longer available, how ever there are other similar ATV/ Duel Sport boots that are available. I know, I know, they are soooo $$$ expensive! Well compare there expense to having a Doctor pin your ankle back together. $$$$$$$
Happy Riding I'll see you on the trail.