This BGF Aerialite cloth is used primarily for SUP’s (Stand Up Paddleboards). The 42″ width is wide enough to fit over the rails of most SUP’s. This E-Cloth has a larger weave and will absorb more resin than 4oz cloth resulting in a heavier and stronger finished product. 38″ wide x 1yd SOLD PER YARD but not cut by the yard. For example if the customer orders three yards they get one continuous three yard piece.