It would sound better to be called 'KID KEEPER SAFETY HARNESS'.
It would be safer, and easier to control the child that trips and goes to fall, if the strap was attached to each side of the harness, via a D-ring and clips. The reason being that if the single strap is held to prevent the child's fall, the child would rotate around, where with a strap going around to attach to each side (under the arms), there is control to prevent rotation. Toddlers in crowded shopping malls can disappear very quickly! Ideally, the side-attachment would be a 6" to 8" stitched to the chest strap, with a snap-clasp at the end of it. That way, the harness can be used to secure a child in a shopping-cart (frequently the cart strap clips are broken), or light-weight back-pack. As a Grandparent who used this type of harness with all my children (4), I could turn my back on them in the grocery store so that I could select goods from the shelves, without having to have one hand on the child to keep them safe. I also used them in my light-weight backpack when they got to the stage of trying to climb up and out! For people who feel using a harness is like treating your child like a dog on a leash - what nonsense - I would much rather keep my child totally secure.
ProsThis harness enables the Parent to be relaxed going out with their child, knowing they will stay safely with them.