10" x 13" catalog mailers are made with 14 lb. DuPont Tyvek and feature a Redi-Strip closure. Protective material is strong and durable enough to easily withstand the most grueling conditions and resists punctures, tears and moisture. Everyday mailers provide a highly effective and useful way to send important information and items whether from home or work. They can help increase the effectiveness of your important mailings and the assurance that your contents will be delivered. Redi-Strip closure requires no moisture for a secure seal and features a release strip for quick, easy opening. Lightweight construction could help you save on shipping costs.10" x 13" catalog mailers are made with 14 lb. DuPont Tyvek and feature a Redi-Strip closure. Protective material is strong and durable enough to easily withstand the most grueling conditions and resists punctures, tears and moisture. Everyday mailers provide a highly effective and useful way to send important information and items whether from home or work. They can help increase the effectiveness of your important mailings and the assurance that your contents will be delivered. Redi-Strip closure requires no moisture for a secure seal and features a release strip for quick, easy opening. Lightweight construction could help you save on shipping costs.