Try A Trial Pack Of (4) If you sell sports cards, these replace the top loaders. You can ship multiple cards in these shields. Weight.... One of these shields only weighs 0.2oz. They can be used to ship other items such as Coins, Jewelry and more. Features and further details I have a Trail Pack Of (4) if you want to try these out and see how they go. I was reluctant when I first saw them also. But once I started using these shields I saved so much money on shipping costs due to the weight and capacity of these. Additional Features: Save on shipping costs compared to traditional top loaders. Just as strong and durable as top loaders. Holds more card capacity then top loaders. Easily fit multiple shields in a plain white envelope (PWE)