Sightline progressive multifocus reading glasses feature the patented SightLine multi focal lens in a classic light-weight metal frame. Rectangular shape with spring hinges, these glasses are made with stainless steel upper eye wires and nylon semi-rimless construction. They come with a six month replacement warranty. The frame is optical quality - not cheap drug store reader quality. This model features anti-reflective coated lenses to aid in glare reduction which helps reduce eye fatigue. You will not find a better value in reading glasses than Sightline 6000. Satisfaction guaranteed - free shipping both ways.