Page Overlays.1 side has a gloss finish; the other side is a matt finish. A4 size. A great Dyslexia, Visual Stress and Irlen tool. Make reading easier and more comfortable The only Overlays made from crystal clear PET, not PVC. Better clarity, reduced glare and sits perfectly flat on page. The Original Page Overlays, designed by Crossbow Education, a UK trusted school supplier since 1993. Dyslexia & SEN specialists. UK Education Resources Award-winning product; Assured by British Dyslexia Association