Backpacker Exped Bivybag Duo New model for this year (Do not check this option if this model was listed as new in last year's Gear Guide) September 30, 2010 Katie Herrel Facebook Icon Twitter Icon Email Icon Brand: Exped Model: Bivybag Duo 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.