Learning instruction in the use of backpack ERGO Baby Carrier, which comes complete with bought a backpack. Suitable as an instruction to any ergonomic rucksack. Parents tell us the ERGObaby carrier is the best of all the baby carriers on the market. It was designed by Karin Frost and has undergone extensive testing by tens of thousands of parents. Its innovative design makes wearing your baby comfortable for hours at a time, gives you the freedom to remain active and productive in your daily life, and holds your baby secure to your body so you are HandsFree.