It's hard to find a good navy sweat. But Sunspel sure know how make a classic understated sweatshirt. Its a loopback, the traditional way, 100% cotton sweat. Not too bulky. Not too light. Just right. Relaxed cut. Designed in England. Made over in Portugal. £105. And yup, you guessed it, looks great with jeans.
If you like ideas, it will inspire you.