Tyvek® HomeWrap® helps protect a home against damaging wind and rain that can penetrate through the exterior cladding into the wall., The unique non-woven fibre structure of DuPont Tyvek® HomeWrap® stops air movement through the walls helping to reduce drafts, improve indoor air quality and providing a more energy efficient home., The breathable structure of Tyvek® HomeWrap® allows moisture vapour to escape helping to promote drying within the wall which can aid in preventing mould, mildew and water damage.