If you hike in Vasque boots, you are familiar with Stealth rubber. It sticks to the rock, period! Many of us only hike with Stealth rubber boots. I just read about a new type of sticky rubber called Gryptonite that sounds interesting. Hiking boots from Montrail use Gryptonite. I have not tried any boots with Gryptonite, but the reviews on MountainGear's web site are impressive. Here's a link to a sale on Montrail boots with Gryptonite. The reviews are on the same page. Also, the boots are on sale!!! Please post a reply if you have hiked in boots with Gryptonite. More information about Gryptonite.