Confidential and secure content: transparent, translucent, recyclable paper document envelopes. They guarantee the content and confidentiality of your package. Variety of uses: these document envelopes are ideal for sending packages, document holders, invoices. Useful for sending printed delivery packages. Easy adhesive closure: paper envelopes are solvent-free self-adhesive for easy packaging with a secure, tamper-proof, dirt-resistant seal.Eco-friendly material: paper bags for environmentally friendly shipping. Fickor non-silicone paper. All components are 100% recyclable.