Ultra-Thin OnePlus 5 Case ($8)
Helianton offers an ultra-thin case for the OnePlus 5 with stylish good looks and a unique textured design on the back. This is more of a snap-on cover, instead of a case, as it doesn't fully wrap around the top or the bottom. It's the same approach OnePlus uses for its own cases so there's still more than enough protection.
This is similar to a "Peel" case, in that the entire thing is made of an ultra lightweight and thin polycarbonate plastic. You'll barely notice you're using a case at all. However, the back has a salient point dotted surface for added texture and durability. Basically, the back is covered in micro-dots to make it easier to hold and it won't be slippery. This prevents the phone from sliding out of hands or off a table, in addition to making the plastic last longer and resist fingerprints or dust. It's actually a pretty great little case. It even comes with a film screen protector for free.