Mountain Warehouse‘s head strap for kids’ sunglasses, $4 on sale.
The price is right.
Once the head strap is on, it’s on. But…
Getting the damn thing onto the sunglasses — which I also purchased from Mountain Warehouse! — was enough to make me want to hurt a kitten. AND I LOVE KITTENS. I would rather pick the poison ivy out of my back garden with my bare hands than attempt another Mountain Warehouse head strap. I’m not exaggerating when I say it took at least 30 minutes before the strap was affixed well onto my kid’s sunnies. NEVER. AGAIN.