Myself and another member of our party were skinning about 100-200 feet or so below the top of Kessler, just a little below the ridge. My friend was roughly 6 or 7 feet above me and noted some slabbiness in the snow. I was close to the trees and nearly on the ridge, but not near enough, apparently, as my friend took a couple of steps and triggered a wind slab. The slab broke right at his feet, so he stayed right next to the crown, but I was pushed off my feet and down the slope. I tried self arresting but couldn't get a hold in the snow and wasn't able to grasp any branches well enough to stop my momentum, and I was taken about 100 feet down the slope until the slab broke up and slid away from me. Upon inspection, we could see the wind slab had broke roughly 2 feet deep, went about 30 feet downhill, and then had triggered another wind slab that was around a foot deep, and continued down the slope. Aside from the two distinct crowns, the rest of the slide was only about 6 inches deep. We could see from the top that it had gone a long ways, but after skiing down, it was apparent that it went nearly the entire length of the slope, roughly 1500' vertical. The weakness appeared isolated to the top of Kessler, which makes complete sense considering the ferocious winds the day before, as we didn't notice any similar issues on our ski down in the more protected terrain. Close call, but fortunate that it was only a ski pole that was lost.