The United Kingdom flag is a combination of the three kingdom’s crosses which are blue red and white. Also known as the Union Jack or Royal Union Flag.Crew Cut Socks Get ready to jump, run, ride, play and be epic with Sox Footwear’s premium crew cut socks. Gone are the days of wearing the same old-school cotton socks built for “comfort” and not performance. Our new technology enhances your sock game, with breathable upper mesh, reinforced heel and toe, and soft PolyLon36 material that makes you feel like you’re walking on air. View the product care instruction here. For an in-depth description of our technology, click here.