OEM Quality Park open-end envelopes, conveniently packaged with 100 per box. These envelopes feature a patented release strip for easy opening and a Flap-Stik closure that does not require moisture to seal. Made from durable DuPont Tyvek, they are resistant to ripping, tearing, and puncturing, providing a stronger and more secure option than traditional paper envelopes. Additionally, they are water-resistant and lightweight, helping to save on postage costs.