The unisex range uses a material that is slimmer and lighter than acetate

Eyestuff by International Eyewear has gone back to basics with its new collection of minimalist frames with a focus on colour and fit on a budget. The unisex range has been designed for all ages and is available in lots of sizes and styles to meet the eyewear needs of a wide range of patients.
Models ES Trail, ES Treble and ES Tropical are made from a thermoplastic material called TR-90 and feature stainless steel temples with colour matching tips. International Eyewear said the TR-90 material, which is cold glaze only, made the design slimmer and lighter than its regular Eyestuff styles made from acetate.