I selected the Kids Banz as opposed to Baby Banz because of the issues cited by other reviewers for the Baby Bands (being that the strap is not sufficient and the child quickly grows out of them), so we had excess strap because we bought larger than what she can fit into now. The product is well made, and they will stay on her. However, she is not happy having something on her face or over her eyes, so we're relying on wide brimmed hats until she can be interested in wearing these. I think they are a smart purchase since polarized lenses provide for protection by reducing glare that regular lenses don't.