Series 1: Medium Expandable Knack Pack®

Key Medium Expandable Backpack Everyday Features Easy-access, padded side-zip computer pocket for 15" laptops Spacious main compartment with organization pockets, fleece-lined tablet pocket and key leash Hidden, zip-away side water bottle pocket Key Knack Backpack Travel Features Separate, patent-pending, expandable packing compartment holds 2 to 3 changes of clothes  Meets most popular carry-on requirements as well as fits under most seats Packing compartment with easy-access suitcase lid  Key Medium Pack Technical Features Custom-developed, durable, water-resistant body fabric  Molded, comfort-cool foam back panel YKK™ water-resistant zipper with custom-designed pullers