I have been waiting to purchase a back pack from Poppy Barley as I find the price high, but this bag proved to be worth it. Although I no longer have any kids in diapers, I have 3 kids ages 9, 7, and 6. I could fit all my necessities, a few snacks, bandaids, wipes, Kleenex, sunscreen, bug spray, and 3 light weight sweaters. I even had two large water bottles on the sides. My husband estimated that the bag weighed 25 pounds or more when full, and I was able to wear it all around the Stampede with no issues. Never any back pain and we always had everything we needed. I'm so happy I finally purchased a backpack and plan on taking it on all my adventures with the kids (zoo, Fort Edmonton, etc). Highly recommend.