mail package

Boxes are made from cardboard, cushion/bubble wrap is polyethylene, and envelopes are made from various paper stocks.

Envelopes use several closure types—clasp closures, gummed flaps, and press-and-seal—and some models include security linings to obscure contents for added privacy.

Business and colored envelopes are offered in standard #10 sizes (about 4.125 x 9.5 inches) and typically use gummed V-flap or gummed flap closures.

Reviewers commonly describe boxes as sturdy and reliable for mailing. Bubble or cushion wrap is reported to protect fragile items well, with users noting good quality and protection performance.

Boxes are described as easy to assemble and ready to address. Envelope sealing varies by type—clasp, press-and-seal, and gummed flaps—so ease of sealing depends on the specific envelope style.

Some cardboard boxes are described as recyclable and one notes U.S. origin. Cushion wrap is made of plastic-like polyethylene and may be recyclable in some programs but is not accepted everywhere.