The Backpack pairs perfectly with the MiniMeis G4 and can be used after your child grows out of the carrier. Made to store your folded MiniMeis when not in use, and to transport all your kids and parent essentials when out and about on adventures. The Backpack can be attached to the MiniMeis carrier when in use, with easy access to whatever you need on the go. The side hooks in the front of the carriers allows for you to take items on the go and continue to be handsfree. The backpack comes in at 14in x 8in x 18in and holds a volume of up to 7.4 gallons. Whether you are traveling with toddlers, taking a hike on the weekend, or need to run around the city, the MiniMeis backpack has got your back - literally.