A customizable returnable rack system for shipping products is provided. The system includes a plurality of racks (10), wherein each rack (10) is selectively displaceable between a collapsed position and an upright position. The racks (10) are adapted to be stacked upon one another in either the collapsed or upright position. The system further includes a first removable dunnage structure (22) couplable to a rack (10) and configured to receive a first type of product and a second removable dunnage structure (22) couplable to a rack (10) and configured to receive a second type of product.