Feel (Good) Skin Age Reverse Serum with Matrixyl, Crolastin & Pentavitin 80mlFeel (Good) Skin Age Reverse Serum with Matrixyl, Crolastin & Pentavitin 80ml. Our Feel (Good) Skin Age Reverse Serum has Active Ingredients Matrixyl, which is known to promote collagen production, Crolastin, which improves skin tone and elasticity and Pentavitin, which is known to aid in plumping, moisturising and hydrating skin for that dewy appearance. Always accompany use of active ingredients with a high factor SPF. Available in an 80ml airless