LUX Extreme Poly Bubble Mailers XL are heavy-duty cushioned mailers designed for larger or more delicate items that need added protection during shipping. Made with 5/16" bubble cushioning, these mailers provide more protection than standard bubble mailers while still offering a lightweight alternative to boxes. The self-seal closure helps speed up packing, making them a practical choice for ecommerce, retail, warehouse, and fulfillment shipments.