Top 8 Advantages of Clear Mailers Clear mailers, also known as transparent or see-through mailers, offer several advantages in various situations. Here are some of their benefits: 1. Visual Appeal: Clear mailers provide a visually appealing presentation of the contents inside. Recipients can instantly see what’s inside the package without the need to open it. This can create excitement and curiosity, making the package more engaging. 2. Brand Visibility: .