First the positive:
The shell is very convenient and the folding mechanism is well thought out and protects the smartphone. The price also fits what you want out of a sleeve so expect more?
BUT:
Have this envelope bought in May, and since then in use. In October, the plastic holder then has already given up the ghost (after it had been broken several times) and now the smartphone has ever lose their hold.
Who needs a budget envelope and with this very carefully avoids these can buy confidently, who needed something more robust for its "Outdoor smartphone", should take some extra cash in hand.