Matthews manufactures Overheads with the best fabric available on the market today. Please refer to our fabric specifications page for a quick overview of what each fabric is useful for. Due to their semi-irregular size, a deposit is required before manufacture. All fabrics are tested in a darkened chamber with an incandescent light source at one end and the fabric positioned two-thirds of the distance between the source and the digital photometer.nnAll Matthews Checkerboard products are cut and sewn with unrivalled precision in the industry today.