Hayes wrote a review of Mountain Hardwear BMG 105 Backpack - 6400-7000cu in on July 26, 2014
Familiarity: I've used it once or twice and have initial impressions
If you purchased a BMG OutDry backpack in 2013 or 2014 and it does not fit right, it might be that you got one of a shipment of these backpacks that has the stays reversed. See photo and comment under the South Col 70 backpack. This is easy to correct by simply taking out the stays and reversing them (actually one stay bent in the shape of a U). Mountain Hardwear corrected this but there may be some backpacks still in use with the stays reversed (My new BMG arrived with the stays reversed). If you are curious about how waterproof the OutDry fabric is, see the results of home tests under the South Col OutDry. The construction of the two backpacks is very similar and both were tested. The results are quite positive. Note: my rating is of the OutDry fabric (you cannot post here without giving a rating). I will wait until I have had more opportunity to test the BMG backpack before rating it. So far so good.