J.R.
Hi R.,
We have a Bjorn Carrier Active that we used for everyday stuff until my daughter was close to a year and started walking. We probably used it more than we used our stroller(s). It never once bothered our backs and my husband is 6’1” 185 lbs. and I am 5’2” 113 lbs., so there is quite a height and weight difference and it was comfortable and easy for us to adjust. My daughter was also pretty small at 18 lbs. 2 oz. at her 1 yr. check up. To take its place, we purchased a Deuter Kid Comfort II Kid Carrier backpack that we absolutely love!!!!! It distributes all of the weight to your hips and absolutely none to your back and shoulders. It adjusts perfectly for both myself and my husband as well and was worth every penny. I believe the maximum weight on it if 45 lbs. Good luck :o) !