I’ve always used the H20 (X-1) cases for paddling (SUP or Prone) but they don’t support the iPhone 6.
What’s the best one for the iPhone 6?
Purchasing phone from Verizon or Apple?
The WireCutter recommends getting AppleCare+ for watersports people:
However, it’s important to know that as with other waterproof cases, the warranty doesn’t cover the phone inside the case. If for some reason the Frē does leak, the cost of repair or replacement to the phone is on you. (LifeProof does have a Total Water Protection Plan, but it’s available only for cases purchased through Verizon and only with certain handsets; the iPhone 6 and 6 Plus aren’t on that list). For this reason, if you’re going to be using your iPhone in rough situations, we recommend purchasing Apple’s AppleCare+ warranty for your phone; AppleCare+ covers accidental damage, including liquid damage.