It’s called Elasty and it was created by designer Yoori Koo. It’s a silicone bumper fitted with elastic strips which allow you to stash your headphones, pens, cards etc. on the back of the phone... genius for the gym or whatever!
Unique iPhone case from Japan created for people who love to pop bubbles and play with bubble wrap. PuchiPuchi case protects the iPhone and simulates bubble wrap popping. Innovative layered design provides realistic bubble wrap sound and feel. Endless bubble wrap case for stress relief and hours of fun.