has anyone ever tried this?

my hat collection has been growing a lot lately and i'm battling the forces of nature from getting my hats dirty (my white hats expecially)

• Description
• Reviews

Based on space-age polymer technology, Perfect Curve Water and Stain Repellent protects your caps from the elements and keeps them looking new longer. It penetrates deeply to repel water, dirt, sweat, and other causes of cap stainage. Special conditioning emollients keep fabrics and leathers soft and allow caps to breathe so your head stays dry. Contains no ozone depleting CFCs, will not discolor or stain fabric, and is odorless when dry

any comments?