A durable way to keep cool: The fibers that make up textiles can be augmented to change how they interact with thermal radiation, but the resulting materials often are not durable. Zeng et al . developed a multilayer metafabric composed of a titanium oxide polylactic acid composite laminated with a polytetrafluoroethylene layer. This combination creates a textile that has passive radiative cooling properties with good mechanical properties and scalability. The textile can be made into clothes or car covers and keeps a person or a car much cooler than other fabrics. —BG