If I get that right, the skin is covering the phone and sticking to it.
Regarding the repairability of the FP it might be less practical than e.g. a Mitch sleeve.
For opening the phone you have to remove the skin and I have my doubts when it comes to reapplying such a skin. Or is this possible.
But one doesn’t have to open the phone of course; except for exchanging the battery or broken modules, i.e. repairs; and that shouldn’t occur too often in the life of the phone.
Well, upgrades (new camera …) are another reason for wanting to open the phone.
So maybe you can rationalize, that a feuerwear sleeve is the better choice in any way. 