This is basically what I carry for work. I am a graphic designer, so I would bring a small notebook to write/ draw down any ideas that suddenly comes to me. And also a big fan of Carbon Fiber, as you can see in my phone case and my wallet. Both very durable carries.
1. PITAKA Aramid iPhone 7 plus Case (World's First Phone Case Made from Bullet-proof Materials):https://www.ipitaka.com/collections/aramid-phone-case-for-iphone-7