Improve your portfolio for Instagram, Behance, Dribbble... or enhance the "presentation value" of your designs to clients and customers.
The textures are high resolution enough to use for screen printing, but much of the detail is very subtle (this fine detail is why they look so good). So you will still need a color separation technician to prepare your files for screen printing.
If you want vintage textures that are more "plug & play" for actual screen print production check out:
Thrift Shop is a layered Photoshop PSD file - 257 MB - compatible with Photoshop CS4 and newer - Available for Instant Download
Did you know: Thrift Shop is also part of T-Shirt Design Master Collection, the best deal on the biggest bundle of t-shirt design resources.