Choose tortoiseshell with a twist with these delicate, lightweight glasses. The square-shaped lenses are gently curved above the eyes to contrast with the sharp angles below. The slender frame is made from a brown toffee-coloured acetate plastic, which adds a vintage feel that stands out against the streamlined aubergine purple metal sides. The flexi hinges are durable and can be bent in any direction – perfect if you're always taking your glasses on and off. The temple tips mirror the front, adding flow and rounding out the design.