This listing is part of the 5 for $25 deal! All listings are marked with '5/$25' in the title. Bundle 5 qualifying items and offer $25. DERMALOGICA Dynamic Skin Retinol Serum A lightweight, high-dose retinoid serum, partnered with squalane, that helps reduce appearance of wrinkles, texture, pores, and uneven skin tone. Brand New! Deluxe Sample!