The only proper or better to say sufficient smartphone protection cases, here already mentioned precisely by Tatatirci with some good reason, are made by usage of D3O® technology. Those cases came from Strax brand GEAR4, from EFM® (Aspen, Cayman, Monaco, Verona) and since 2013 from Tech21 (but only if they did not change something in their production). To be clear and as my subjective approach, the rest of the already mentioned cases here have only cosmetic purpose related to so called money/music issue.
Yes, I would be very thankful if Purism contact here mentioned ones using D3O® Protection and hopefully we have same PROTECTIVE Cases for Librem 5 available in the future, hopefully soon … Please! And even if it would be by individual requests production price (by way of pre-order or something similar, directly or indirectly), why not to try to make those somehow available to some of us?
Furthermore, as NXP i.MX 8M is quite big and powerful engine let us leave Purism people to make requirements for design and production of certified protective case, purposely tailored … meaning here for me is important Librem 5 edges protection, as slim as it is necessary, from eventual (few) upcoming drop(s) and not whole body clothing (called armour) that may cause additional and/or certainly unnecessary heating issues. Thanks!