Being the same size as Field Notes, you know they fit in your pocket like a champ. That means they even fit in my Nock Hightower, no sweat.
The cover is a cardstock that is fairly resilient. I expected it to fade faster since it's a black stock, but it's held its color really well. I've recently transitioned to working from home, so my pocket notebooks don't get nearly as much time in my pockets, so keep that in mind. Daily pocket carry would definitely leave more signs of wear.
The design of the cover is unassuming. It's a black book with some white text that describe the book. Personally, I love the look of the black books as well as the other colors. I don't believe you can buy the 3-pack traffic light variety any more, but they very recently released a very attractive 6-pack of gorgeous colors that I feel compelled to buy.
The inside covers are blank, which feels a bit odd after using so many Field Notes. But, the beauty of a blank white cover is that it can be used for whatever you want. You can add your own personal contact information or favorite uses for the books. Hey, if you're really careful you can even draw your own ruler.
Three silver staples bind the book together, and I haven't experienced any issues with the binding coming apart. These are really well-made.
Overall, these are fantastic notebooks that I highly recommend. For me, they've become the new standard. I won't be able to resist any special edition Field Notes that come along that strike my fancy, but these definitely have my vote over the standard edition. They're working notebooks, and that's what matters.