Introducing EnvyPak Insight™,a full face window envelope revolution Contact: SalesPhone: 877-835-3052Email: contact@envypak.com Columbus, Ohio – EnvyPak®, the clear leader in marketing envelopes and packaging products, has developed EnvyPak Insight™, a first-of-its-kind, full window paper envelope providing full visibility to marketing materials. EnvyPak Insight’s patent pending full window paper envelope just received USPS automation letter postage rate approval. Designed with automation in mind, EnvyPak Insight includes moisture-activated flaps and is .