I rode in this suit last summer in Laguna Hills...the Telonics trail or PB or whatever it's called. It's super steep and was really dry/dusty when I rode it. Let's just say I didn't have one of my better runs...I crashed 4 times...hard. At the end my front wheel was bent and my seat was sideways, and not to mention I walked the last 100 yards out. And I almost didn't put this suit on for my run! My upper body would have been thrashed, but instead, I came away with no injuries.