Tyler wrote a review of Arc'teryx Cierzo 18 Backpack - 1098cu in on April 18, 2010
awesome pack. i hiked up to the saddle of Big Baldy, set up camp, and left at 2am to start my summit bid on Timp in April (still alot of snow). and used this bag for the bid. it carried my shell, down jacket, hard shell pants, extra base layer, heavy gloves. 2 nalgenes, and the front pocket carried my food and camera. the pack is also surprisingly water proof. i used it as a seat mat, put my boots in it at night (as i was in a bivy).I only complaint is that it has no ice axe loop or trekking pole straps.