Abstract: A sun shield capable of protecting persons or plants against the harmful effects of incident radiation and being formed from a substantially transparent flexible material (13) which at least substantially absorbs and/or reflects incident radiation in the ultraviolet and infrared frequency ranges and which may be repeatedly folded without becoming damaged. The supple, flexible and durable transparent material (13) may be mounted on a framework (14) to be attached to, for example, a child's car seat (11) or pushchair (26) or to serve as a parasol or canopy, or to protect plants from excessive ultraviolet or infrared radiation.