Bubble Lined Mailers We know the importance of items and letters sent by post reaching the intended recipient in perfect condition. Envelopes and mailers that offer an extra level of protection are a great way to achieve this. At Macfarlane Packaging, we stock a superb range of bubble lined mailers that will help protect items from vibration, mishandling and anything else that may occur during transit. Our mailers come in a spectrum of sizes for different needs. We also supply sealed mailers that offer a higher level of protection for items when required. We offer both white and gold options, depending on your preferences, as well as packs that use extra strong bubble to house the most important items and help prevent unnecessary damage.