Sometime last year I went through a purging spree. Everything I didn’t really use within the last few months had to go. Of the casualties, my REI Flash 18 Pack was the one I missed the most. Worst idea ever. I kept meaning to pick one up but never did, making do with the packs I had at the time (hi, Scrambler 30). When Outdoor Research came out with the Isolation Pack this spring, I knew that it was time for me to pick up a summit pack replacement.