It's officially spring. Time to break out the grill, beer, and bike—it's time to have fun. Oh, and don't forget some striped shirts, too. If your wardrobe is slacking on that category, you're in luck. Sunspel is running 20 percent off its striped garments from now through April 2. Now's your chance to stock up on non-white tees before it warms up. Shop the sale here.