The article "Designed to Degrade: Tailoring Polyesters for Circularity" by Celine V. Aarsen, Anna Liguori, Rebecca Mattsson, Mika H. Sipponen, and Minna Hakkarainen, published in Chemical Reviews, discusses the development of polyesters designed for mechanical recycling, chemical recycling, and biodegradation to promote a circular economy. The authors highlight the importance of tailoring polyester chains to enhance circularity through the incorporation of more easily hydrolyzable ester bonds, additional dynamic bonds, or degradation-catalyzing functional groups. They also review the use of green catalysts, such as enzymes, to facilitate degradation processes. The article covers various aspects, including the chemical recycling and biodegradation of polyesters, the modification of polyester chains to increase biodegradability, and the design of polyester-based materials as alternatives to current volume plastics. The authors emphasize the need for materials that can be recycled under greener conditions and degrade rapidly even under less favorable environmental conditions. The review concludes with an outlook on the future of circular polyester materials and their potential in replacing conventional plastics.The article "Designed to Degrade: Tailoring Polyesters for Circularity" by Celine V. Aarsen, Anna Liguori, Rebecca Mattsson, Mika H. Sipponen, and Minna Hakkarainen, published in Chemical Reviews, discusses the development of polyesters designed for mechanical recycling, chemical recycling, and biodegradation to promote a circular economy. The authors highlight the importance of tailoring polyester chains to enhance circularity through the incorporation of more easily hydrolyzable ester bonds, additional dynamic bonds, or degradation-catalyzing functional groups. They also review the use of green catalysts, such as enzymes, to facilitate degradation processes. The article covers various aspects, including the chemical recycling and biodegradation of polyesters, the modification of polyester chains to increase biodegradability, and the design of polyester-based materials as alternatives to current volume plastics. The authors emphasize the need for materials that can be recycled under greener conditions and degrade rapidly even under less favorable environmental conditions. The review concludes with an outlook on the future of circular polyester materials and their potential in replacing conventional plastics.