Windproof material for workwear

This standardisation/icon indicates that the material of these clothes is highly protective against strong winds. Fabrics or materials may be naturally windproof or a special membrane is placed between their layers. This is the case with fleece, for example. The unique intermediate layer ensures that the fabric is both windproof and still breathable. This standard indicates the air permeability of workwear and requires windproofness to be good, i.e. little or no air is allowed to pass through the garment. For a garment to be windproof, the material must allow no more than 5 litres of air per second per square metre. The garment therefore needs a windproof lining/layer or it must be windproof in itself to obtain this certification. Besides a windproof inner lining or layer, there are a number of other applications that enhance the windproofness of workwear. You can think of taped seams, a high collar and/or a wind catcher in the sleeves/thumb loops, at the zip collar or behind the zip. In cold conditions and outdoor work, windproof and heat retaining properties in clothing are very important.