Tension is an established and reliable resource for custom printed mailing, promotional and shipping solutions. We produce bi ... llions of envelopes a year and take great pride in being a leading manufacturer of custom envelope solutions that people and businesses around the world send and receive. We are privately owned and operated and our products range from standard commercial styles to unique specialties including one-of-a-kind mailing and packaging products. Whether it’s direct mail, financial transaction envelopes or everyday communication products, we believe that how information is conveyed and presented through the mail is essential to the communication process. read more