For maximum safety, never shift a seat to a borrowed bicycle. Backpacks Backpacks may be the safest option, but they are not risk-free. Comfort for the parent is important, especially on long walks. Padded shoulder straps and a waist belt help take much of the load off the lower back. Backpacks come in various sizes.
Large backpacks are more comfortable for the child and offer greater support.
But because of their size, they can be cumbersome to use indoors and to store. The backpack must comfortably keep a baby's back, trunk, and head upright. Safety straps will constrain the child if you fall and keep babies from crawling out. Ample padding on the frame ensures the child's comfort and prevents injury in a fall. Many of the safety tips cited earlier also apply to backpacks.