In this age of countless plastic bags, hard cases and silicone overcoat me the envelope appeared as pleasant change - and I was not disappointed. Meticulously crafted to serve as "Ersttasche" for my OnePlus One (the original bag seems to me due to the exorbitant costs of supply as far too expensive). The substance is discreet but not boring, the lining cleans a bit the screen when removing and overall takes the bag to the One its "thinness" not too much. While it offers little protection when dropped, but as a fancier scratch protection, it is recommended. It could sit a little loosely, because you still have to apply a little patience to get the one from the sheath.
(Did I from the same manufacturer also a cover for the Samsung Galaxy Tab S 8.4 brought with similarly high satisfaction rating)