amazon travel.backpack Basics Travel Backpack,Carry-On with Laptop Compartment, 1.55 cu. ft. Capacity,Expandable for 10% Extra Space,Convertible Backpack & Shoulder Bag,Multiple Pockets,13.8"W x 21.5"H x 9.5"D, Black Backpack Inner Organizer Multi Models (all sub models):Trek Gritty pat08 but perfect for checking)

amazon travel.backpack Basics Travel Backpack,Carry-On with Laptop Compartment, 1.55 cu. ft. Capacity,Expandable for 10% Extra Space,Convertible Backpack & Shoulder Bag,Multiple Pockets,13.8"W x 21.5"H x 9.5"D, Black Backpack Inner Organizer Multi Models (all sub models):Trek Gritty pat08 but perfect for checking)

Backpack Inner Organizer Multi Pocket Laptop Document Storage Divider Liner Bag | eBay

Kelty has the best selection available for this style of pack

pat08

Models (all sub models):Trek Gritty

How Do I Carry All My Photo, Climbing, and Camping Gear for Multi-Day Photo Excursions Shooting Alpine Architecture

but perfect for checking)