The best way to keep pests out of your belongings is the pack them in boxes that have airtight lids. Plastics boxes are typically the best choice and are especially good to use for liners, fabrics, blankets, and clothing.
If you choose to use cardboard boxes, we recommend buying new boxes. This will ensure the boxes are stronger and are less likely to have any punctures or gaps that pests could enter. If you are using cardboard boxes in your storage unit, we recommend making sure the tops and bottoms are taped securely, rather than folding the box flaps to close them. This will keep the bottom of the box strong, and give a little bit of extra protection against pests.
If you choose to use moving boxes that you can get for free, be sure to avoid using cardboard boxes from grocery stores or restaurants. These boxes are known to attract unwanted pests. When choosing what to pack your items in, keep in mind what you are packing, and how much protection you want your items to have.