Socks Mockup Against a Solid Surface. Check out this mockup of a pair of socks against a solid surface, you can choose whatever color you want for it! Or you can even make it transparent, using the hex tool to the right of the page. Awesome, right? Upload different designs for each sock if you want, using the menu on the left. All free Mockups iPhone, iPad, MacBook, iMac, Apple Watch, Packaging, Billboards & Signs, Fashion & Apparel, Food & Beverages, Magazines & Books. Or browse by category. A free sample mockup (get the whole set) of a coffee cup standing next to a plant. The PSD file allows you to change the cup color and branding.