1) Spigen Galaxy S8 Plus Case Liquid Air Armor (on the left)
https://www.spigen.com/collections/galaxy-s8-plus/products/galaxy-s8-plus-case-liquid-air
$80
2) Mophie Galaxy S8 Plus charge force case (on the right)
http://www.mophie.com/shop/galaxy-s8/charge-force-wireless-case-galaxy-s8-plus
$80
Interested please PM