E-GLASS is the most common fiber reinforcement used in the composites world. It is popular because it offers very good performance for how much it costs. It is not as strong or stiff as the higher priced Sglass and Carbon, but is still a high quality material. Our Eglass boards are constructed exactly like the high end Sglass and Carbon but with this more inexpensive material. They are also glassed a little heavier to compensate for some of the loss of strength and stiffness.