Deuter brand kid/baby carrier can haul kids up to 48 lbs. Very comfortable with 5 point harness and several fun features including a retractable mirror that you can use to check what your kid is up to hanging out of site. LOTS of great storage including an easy to access hip-belt pocket. There's even a sleeve where you can insert a hydration pack. You can buy a shade/rain cover that fits overhead also. The aluminum frame folds out to stabilize the packback on the ground.
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