Baby backpack carriers should not be confused with other baby carriers that are made from all cloth material that are worn in the back. Backpack baby carriers are the ones with metal or plastic frames and can be worn in your back (like mountaineering backpacks). While there are a lot of cheap backpack baby carriers available in the market, most of these do not provide the necessary support to hold your baby comfortably especially if they are worn for longer periods.
Baby backpack carriers are manufactured using the same principles as that of mountaineering backpacks. They distribute the weight evenly in your back so even if you carry your baby for longer periods, you will feel the weight in your hips and there is very little stress on your shoulders and back. When you buy baby backpack carriers, you have to choose one that is well-padded so that both you and your child can be comfortable. It should have a high back that will support your child, and you should easily wear it without any assistance. The straps are often adjustable but you have to be extra keen in observing how the straps were sown. There have been backpacks that came with free sun shade or rain covers which can be attached at the top of the carrier. These backpacks have been proven to prevent sunburn.
Backpack baby carries are not always necessities but they are advised for children who are older (over a year old is best). You have to remember that while kids can walk, they cannot keep with your pace. These are way better than strollers because it would allow you more mobility as you can take long strides when you walk and not have to worry that you will hit the stroller wheels; and baby backpacks can also allow you to trek rough terrains while your child gets a nice view of his or her surroundings as you walk. You can also feel safer especially in areas where there are a lot of people because your child is connected with you.
However, it would be difficult to tend to your baby's other needs like wiping their nose or putting a hat on because your child will be behind you. If you are going out and you plan to use your baby backpack carrier, make sure that you bring a small mirror with you so that you can check your baby time to time.