Sisters, not twins. The OG Filla brings the collagen, and PWRNAP brings the retinol. They're the ultimate duo for long-term volume training for your undereyes. Each Filla Set comes with one Filla Undereye Volumizing Collagen Pads set, and one Filla PWRNAP Overnight Retinol Mask. Got tired under eyes? We've got you covered. Save $6 when you purchase the two Fillas together!