How O2 Kid Lids Work
The hats should fit right over the top of the ear so the ribbons are at or just in front of the ear. The ribbons should be tied securely to hold the tubing in place.
The back of the hats are open for ventilation so they don't get hot, even with a fever. They are also adjustable to grow with your child.
If your child is a boy or you don't like the ribbons, they tuck under the hat nicely so they wouldn't be in view.