Quality Park 100% Recycled Kraft Catalog Envelope, Redi-Seal, Brown Kraft, 10 x 13, 100 per Box, (43711) DURABLE: Made from 24 lb. brown kraft stock MULTI-PURPOSE: These 10 x 13 envelopes are perfect for storing or mailing documents flat when folding is undesired VERSATILE: Great for mailing, storage, and organizing in both home and office environments SECURE: Redi-Seal closure will ensure your contents stay safe with the licking factor out of mind GREAT VALUE: Conveniently packed in 100 count to reduce the frequency of repurchasing