Cotton duck bags are proved to be very waterproof in use. The canvas is tightly woven and impregnated with was to repel moisture. When sewn, the cotton fibres swell when inContact with water and help to plug the holes made by the sewin needle in a way that is not possible with man made fibres like nylon or polyester. Although we cannot claim that they are 100% waterproof under all conditions , history suggests that bags made from cotton duck will keep your contents dry. For very extreme wet weather we would recommend polythene liners to be safe.
Our cotton duck bags can be re-proofed many times using our re-proofing wax. This ensures the bags stay as waterproof as possible for many years.
For users wanting peace of mind, our CarraDry range of bags have welded seams and are 100% waterproof.
Any stitched Cordura, nylon or polyester bags are not waterproof at the seams. The fabrics themselves will be waterproof as they will have an impermeable backing and a water repellent finish but after stitching they can be vulnerable to water ingress. We advise users of these types of bags to use a raincover or use polythene bags to protect your essential items.