These Quality Park® envelopes have resealable Redi-Tac™ closures for a modern take on interoffice mail. Save time and keep office memos circulating without metal clasps or string and button closures. Redi-Tac™ interoffice envelopes will open and close effortlessly through thousands of uses. Durable 32 lb brown Kraft stock holds up to prolonged daily use. Envelopes are formatted with five columns on the back side with narrow ruling for signatures. Holes allow users to tell at a glance if documents are enclosed.