Ensure your items arrive in perfect condition with Progo 30 x 36 x 5" Expansion Poly Mailers. These gusseted poly shipping bags are perfect for shipping bulky items like clothing, blankets, purses, quilts, and books. Made from high-quality, tear-proof polyethylene, these mailers are designed to protect your goods with their water-resistant, leakproof construction. The 5" expandable bottom gusset provides extra space and flexibility for overstuffed or odd-shaped items, while the tamper-proof self-seal adhesive strip ensures that your package stays secure during transit. Durable, lightweight, and versatile, our poly mailers are a must-have for both personal and business use. Whether you're a small business owner shipping apparel or someone sending a thoughtful gift, these mailers provide reliable protection and peace of mind.