Spigen Liquid Air Case ($10)
A brand that I've started to rely on for every smartphone release is Spigen. They have at least 6-7 beautiful cases that will keep your Galaxy S8 looking new for years to come. Additionally, many want a case that will protect the phone but not add too much bulk.
That's where the Spigen Liquid Air comes in. Using a thin yet durable TPU material it keeps the phone safe without adding bulk. The edges around the screen are slightly raised up too, which protects the screen if you set it face-down.
Spigen is a tried and trusted brand we know very well and can recommend without hesitation.