Folding boxes are generally used for unit and intermediate packaging. This specification limits content weight to 20 pounds (see table I). Boxes covered by this specification can be used for heavier weights when, in the opinion of the procuring activity, the box will be adequate. Resistant variety boxes are intended for use in packaging items such as bakery goods, for retaining the moisture content of the item packaged, or to prevent grease from penetrating through the paperboard. Resistant variety boxes are not intended to be weatherproof.