100 #2 Pink 8.5x12 Poly Bubble Mailers Envelopes Bags Hot Pink 8.5" x 12" Extra Tuff Turtle Shell for Added Protection, Water Resistant High Quality Poly Bubble Mailers Our poly bubble mailers are unique, lightweight padded mailers made from a durable, moisture resistant, multi-layer blend of polyethylene film. The self-seal closure provides a reliable, tamper-evident seal to secure all enclosures, while being opaque, the exterior film creates a crisp, professional image for your company.