Secure your mail during transit. We understand how frustrating it can be to stuff your envelope and worry about its safety during transit. Our 9" x 12" Peel and Seal Tyvek envelopes easily create a strong seal so your contents will stay inside the envelope without the need for glue sticks or tape. Durable Tyvek construction is lightweight but resistant to tearing, ripping, humidity, water damage, or puncture. Timesaving peel and seal flap creates a strong seal that will easily contain even heavy documents or publications during transit. Use these envelopes for organized and secure storage. Envelope can be labeled with address labels or to identify stored contents. Wide opening, tear proof Tyvek material and heavy duty construction allows for storage of many different types of documents or small personal belongings from receipts, photos, or small documents to large reports, company financials, magazines, promotion materials, or tax documents