Sacks for the transport and storage of materials in bulk; Bags and sacks for packaging, storage and transport of materials in bulk; Packaging materials, namely, sacks, for the packaging, storage and transport of bulk materials; Sacks, not of textile materials, for the packaging, storage and transport of bulk materials; Valve sacks in the nature of packaging bags and sacks made of woven and non-woven textile materials and composite combinations therewith