Made of 100% recycled paper, these envelopes have a honeycomb padding that protects like a bubble shipping envelope while being more sustainable. Strong yet lightweight, their honeycomb padding also makes them more rigid than bubble shipping envelopes, so they prevent parts from bending during shipping. However, they do not absorb shock as well. Close them with the built-in adhesive strip. When you're finished using them, toss them in your recycling bin. There are no special requirements for recycling these envelopes.