Getting your mail out the door is a quick and painless process with these bright white labels. Avery address labels with BlockOut technology are the ideal choice for sending large envelopes, parcels, mailing tubes and boxes as they completely cover what's underneath. They are a great cost saver because you will be able to reuse packaging as any old text or label is completely hidden. What a great way to help the environment too, plus these Avery labels are eco-friendly.