Mailing Bags At Macfarlane Packaging, the selection of dispatch sacks we have available has been created to provide that extra layer of protection to items when in transit. These polythene mailing bags are made from recyclable materials, providing you and your customers with peace of mind knowing that they are using eco-friendly products. All the dispatch sacks in our range are opaque, helping to ensure higher levels of security and confidentiality for anything that is contained within them. These mailing bags have a self-sealing strip, meaning no extra material is required to safely seal them and sent items on their way. We offer dispatch sacks in a wide selection of sizes, allowing you to find the right wholesale packaging for your specific needs. All our dispatch sacks come with a pre-printed child safety warning, helping to keep customers safe. These dispatch sacks are a great form of protective packaging and are ideal for retailers looking to enhance the standard of their retail packaging.