Backpacker Backpacks Big Sky International Shadow October 12, 2009 Katie Herrel Share this Facebook Icon Twitter Icon Email Icon Join Backpacker Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join Backpacker Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Brand: Big Sky International Model: Shadow Existing modelExpandable main body and add on modules to increase volume. When you buy something using the retail links in our stories, we may earn a small commission. We do not accept money for editorial gear reviews. Read more about our policy.