ByAnnie.com and Patterns By Annie - "Ultimate Travel Bag 2.0" might seem like a challenge to sew if you haven't tried it, but you'd be surprised what an attainable project it is!
Amazon.com: J.L. Childress Ultimate Backpack PREMIUM Padded Car Seat Travel Bag - Thick Padding, Heavy Duty Backpack - Gate Check Bag for Car Seats - Fits All Car Seats & Booster Seats -