Protect your shipments with our premium Expanding Bottom Gusset Poly Bubble Mailers, designed for secure, efficient, and professional packaging. These mailers feature a bottom gusset that expands to accommodate bulkier items without compromising protection. The 7/64" bubble lining cushions contents from impact, while the self-sealing adhesive flap ensures a fast, tamper-evident closure. The anti-static release liner peels smoothly for quick processing. Made from tear-, puncture-, and moisture-resistant white film, these mailers offer a clean appearance and rugged durability. Reinforced with side heat seals and a bottom fold to prevent bursting, they're ideal for e-commerce, office shipping, and fulfillment centers.