Single wall corrugated boxes are strong and give a certain amount of protection to their contents providing they are not too heavy. Made with inlays of fluting within the construction, these cartons are ideal for resisting any crushing and built for filling with light ceramics or books to engineering parts and accessories. If you're contemplating transporting heavier items then probably double-walled boxes would suit you better.
Double wall corrugated boxes are stronger than Single wall versions and allow a better form of protection especially for long-term storage or for transportation of heavier objects.
Similar to the Single wall, another flute is added to the board. However, it is glued not in line with the other and therefore increases the strength of the material. Now you have a twin cushion and enables even better resistance to shocks or crushes.