As one of its daily deals, REI-Outlet offers the ECOXGEAR Eco Pod Waterproof Smartphone Case in Black or Orange for $17.73 with free shipping. That's the lowest total price we could find by $16. It's compatible with iPhone and Android smartphones and features water resistance up to three feet, waterproof earbuds, detachable clip and belt slot, exterior pressure-release valve, and internal storage. Deal ends today.