This is a really stunning render of some wearable tech, from Issam Trabelsi at YankoDesign.
The concept is a simple one. Finger phone. To be made from soft silicone and flexible rubber it's designed to be waterproof. Sending notifications through vibration and possibly bone conduction for sound transmission. There are to be buttons for basic tasks and texting is mentioned in the blurb but I've not worked out how that is supposed to be achieved. There are a couple more images below but that's really it, some nicely crafted images and a short blurb. I suppose that's what concepts are. It's nicely done and quite attractive. Perhaps something we'll see in the future.