I bought this for my cavapoo, who ruptured his cruciate ligament and was limited to walking 10 mins twice a day. I have another dog and it has meant that after doing his 10 mins, I could put him in the backpack and we could continue our walk as normal.He seems to love it, the pack is really well designed and comfortable to wear. It has both a chest strap and waist belt. He weighs 8.9kg, so is towards the upper end of the allowed weight, but fits with no problem. I can see us using it in the future when he is older and can't walk the same distances anymore. Great product!