This envelope and letter mockup is appropriate in making brand individuality design to impress your customers. They are essential stationery items in branding.
This mockup includes an open envelope with a folded A4 paper. You can change the color and update with smart layers as they are layered PSD files.
Thanks to Pixeden for the constant supply of high quality mockups to the design community. Get on their website to access some other interesting mockups.