Decovil is a iron-on, leather-like, sturdy interlining. It gives a nice shape to f.e. bags, folders and decorations. Decovil is suitable for all fabrics and is 90 cm wide. 
Place the interlining with the covered side on the wrong side of the outer fabric.  Cover with a damp cloth and press with the iron step by step for about 6 seconds. Do not make any ironing movements. After fixation, allow the parts to cool flat for about 30 minutes so that the adhesion can stabilise.