In our online shop you will find a large selection of reusable folding bags in fabrics such as cotton, non-woven, polypropylene and polyester. The customised foldable tote bags to carry in your bag made of the latter material usually indicate, in their product sheet, a code with three numbers and a letter that represents the mass in grams per 9,000 metres of fibre, the higher the number, the more strength and durability the product will have.