If you ship products regularly, these Fosmon poly mailers are about to become your new best friends! You get 100 high-quality self-sealing envelopes measuring 10x13 inches - perfect for shipping clothing, books, small items, and other non-fragile goods. The polyethylene construction is water-resistant, tear-proof, and puncture-resistant, so your items stay protected during transit. What's really convenient is the self-seal feature - just peel off the protective strip and press closed for a secure, water and dirt-resistant closure that doesn't require tape. The silver inner layer provides confidentiality for your shipped items, and the lightweight design helps save on postage costs compared to boxes. The high-strength seams can handle over-stuffing if needed, and ink, stamps, and labels adhere easily to the surface. These are approved for use with all major carriers including USPS, UPS, and FedEx, so you're covered no matter which shipping service you prefer. Whether you're running an e-commerce business, selling on platforms like eBay or Etsy, or just need reliable shipping supplies for personal use, this 100-pack gives you plenty of envelopes to handle your shipping needs. They're efficient, professional-looking, and much easier to pack and seal than traditional boxes. It's one of those bulk purchases that pays for itself quickly in saved time and shipping costs.