Lowe Alpine Strike 18
Here's what other sites are saying:
Just as cool and collected as its elder (the Strike 24), the Lowe Alpine Strike 18 backpack is always ready for action. Built with the same Air-Contour design as its larger counterpart, the Strike 18 reduces surface-area contact between your back and the pack, keeping your back dry and comfortable. The only difference between Senior and Junior is size--keep all of the features you love without the bulk of a large daypack. From neighborhood jaunts to full-day treks in the Tetons, the Lowe Alpine Strike 18 lets you savor the moment in comfort and grace.