With security tints and dependable adhesive Quality Park Redi-Strip Security Envelopes are reliable as it gets for confidential mailing. Once priority documents are ready for shipping be sure to preserve their integrity and condition inside the durable white wove paper. As you peel away the attachment and seal the envelopes closed rest assured they ll be safe from prying eyes thanks to the security tint. Heat-Resistant Adhesive. Seam Type: Side Flap Type: Commercial Trade Size: 10 Security Tinted: Yes.