Hey community!

I'm eyeing these backpacks with great longing. What does the +10 mean?

I know it can't be the price, since the Alpinismo 45 Backpack and the Phantom 45 + 10 Backpack are both the same.

Help a backpacking novice out?

deals aren't that great on the sleeping bags. Take another 10% off of the inflated "retail list price" and you've got a deal.
http://www.timberwolfsports.com/store/index.php?main_page=index&cPath=2