Iselector via Amazon offers Prime members the Iselector Waterproof Hard Case for iPhone 6 Plus in four colors (Green pictured) for $29.99. Coupon code "TSP4FKRG" cuts it to $19.99. With free shipping, that's $10 off and a very low price for a waterproof case for the iPhone 6 Plus. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.18.) It's also shock-, snow-, and dirt-proof.