Kelty Coyote 4750 (80 ltrs)

Just a noob response, however, Kelty has a lifetime warranty on all backpacks.

Life time Warranty: "...for the lifetime of the product, against defects in materials or workmanship...Kelty warranty does not cover defects attributable to or resulting from normal wear and tear i.e. exhausted zippers), natural hazard damage (i.e. weather and animals, UV), abuse or alteration. (KELTY.com)