It's such a pain to do traditional overlays. You need to cut out individual pieces of transparent paper (and make sure it's to size), tape it to your underlay, and of course, make sure you don't lose a single sheet. Created just for educational and drafting purposes, the E- series is designed to lend a helping hand for all your overlay needs (without the hassle). Create, adjust and repeat!
Materials: 125 gsm vellum, 160 gsm brilliant white paper