Woven glass fibre roving fabric made from heavy untwisted "E" glass yarn having resin compatible surface-dressing or size. Woven roving are often used in composite laminates with chopped strand mat, later being used to increase the bulk of the laminate. Rovings wet far more quikly than certain types of mat, pick up a lower percentage of resin (i.e. approximately 50% glass 50% resin), and have far better physical properties. A roving laminate is much stronger than laminate made from chopped strand mat and a thinner, lighter and less expensive laminate can often be made.