All fabric is sold in quarter metre increments (25cm), if you would like a metre add 4 to your basket, if you would like 1½ metres add 6 to your basket etc. Orders of more than quantity 1 will be cut in a continuous length unless requested otherwise. Please see chart below for unit conversions. This non woven interfacing is adaptable, air-permeable, fine-pored and washable up to 60°C. Ideal as a base material for non-medical mouth and nose masks. Properties: Washable at 60 degrees centigrade. See image for technical dataComposition -60% PES, 40% CelluloseWidth - 90cmWeight - 51 g/ m2 Fabrics: Ideal for making masks Product benefits & Care: simple to apply long lasting shape also washable at higher temperatures machine wash at 60 dry cleanable Iron settings 8 seconds How to use: Place the interfacing with the coated side on the wrong side of the fabric. Then using dry heat glide the iron firmly 5-6 times very slowly over each area of the insert, so that each area receives approx. 8 seconds of heat. Iron setting: Wool. Allow the pieces to cool flat for about 20 minutes, so that the adhesive can set properly. Length Number of units to order 25cm 1 50cm (half a metre) 2 75cm 3 100cm (1 metre) 4 125cm 5 150cm (1.5 metres) 6 175cm 7 200cm (2 metres) 8 225cm 9 250cm (2.5 metres) 10 275cm 11 300cm (3 metres) 12 325cm 13 350cm (3.5 metres) 14 375cm 15 400cm (4 metres) 16