500 - #000 - 4x8 POLY BUBBLE MAILERS PADDED ENVELOPES 4.4 " Wide- Extra - Wide - Lightweight padded mailers made from a durable, moisture resistant, multi-layer blend of polyethylene film. The film is laminated to a resilient, cushioning bubble material for added protection. Durable and moisture-resistant, with exceptional puncture resistance, tear strength, and cushioning performance. The self-seal closure provides a reliable, tamper-evident seal to secure all enclosures. The opaque, bright white exterior film creates a crisp, professional image for your company.