10 X 13 Poly Bags. 100 Count Pack. 2 Mil Thickness. Light Weight. Durable White, Opaque Bags With Inner Lining. Provides Extra Privacy And Security Of Items. High Strength Self-Sealing Adhesive. Tamper Evident. Water, Dirt, Tear, Puncture Resistant. Perfect For Shipping A Wide Variety Of Non-Fragile Items. Made To Withstand The Shipping Journey. Customer Satisfaction Guaranteed. Please Do Not Hesitate To Contact Us With Any Questions Or Concerns. Can Be Used With All Shipping Providers. USPS, Fedex, UPS Shipping.