 And nylon is, gives you the best of both worlds as the impact resistance and it has the optical purity of glass. Um, and furthermore, it's extremely light. So that whole pair of glasses in your hand, Keith, if you're holding them, that weighs less than one ounce. And I might, you know, a regular pair of sunglasses you're wearing might weigh three or four ounces. It's something, if you just throw them on for a second, take them off, you might not really pick up on, but over the course of five, six, seven hours,