Here are all official OnePlus 3 Back Cases

Four of the five cases, including the Bamboo, Black Apricot, Rosewood and Karbon are made by Evutec - a popular US case manufacturer, who's approach and philosophy does fit nicely with the ECO theme.These four cases have the same thickness and overall feel and also share the same price of €25

The wood options have just a slight texture feel and the Karbon is almost entirely smooth.

When it comes to choosing a favorite, it's all about personal taste, but going around the team, we mostly agreed that the Bamboo and Rosewood options are a bit tacky unless the occasion demands it.Sandstone case is currently selling for €20 so it's also the cheapest of the bunch.