These carbon fiber collar stays are a must-have for any fashion-savvy man. The set comes with multiple sizes to fit any shirt, and the sleek black design adds a touch of modernity to any outfit. As a result of using this product, I found that my collars stayed crisp and sharp all day long. The only downside is that they can be a bit slippery to handle, so be careful not to lose them. Overall, a great investment for anyone looking to step up their collar game.