I purchased my Keen boots about a month ago, and I've been happy with them; however, after hiking yesterday and falling several times, I realized I have fallen/slipped on just about every hike since I began wearing them. They are full leather with vibram soles...rec'vd good reviews. I'm wondering if the soles need to be 'treated' somehow? I don't want to compromise the boots, but after falling 4 times yesterday...I'm concerned! And yes, I know that hiking here in the south on wet leaves on the trail, etc. you have to be extra careful...but I'm an experienced hiker..believe me...this definitely seems to be more than normal slipping!