Product #3

Polish: Revlon ColorStay Nail Enamel

$6, drugstore.com

Tester wore during: Swimming, running, 10-hour days of typing

Chip free days: 12 (before removing)

Tester says: "This stayed on until I took it off — I just wanted to change colors. I'll use the clear polish to help make my other shades stay on longer."

Why it lasts: Acrylic polymers (plastic that adheres to nails)