The super rugged CAT S31 goes on sale in the US for $330
It surely is a high price for a middle-class smartphone, but the CAT S31 is a rugged device so you'll get a very sturdy handset that can be even used in hazardous environments (within some limits).
However, the rugged smartphone features IP68 certification for water and dust resistance. Basically, the CAT S31 should continue to work even if submerged in water, up to 1.2 meters for up to 35 minutes. On top of that, CAT added MIL-SPEC 810G rating, which should allow the phone so survive drops on concrete from up to 1.8 meters.
It's also worth noting the CAT S31 comes with dual-SIM support, 4G LTE, VoLTE, VoWiFi and Android Nougat on board. The smartphone is available for purchase in the US via local major retailers like Amazon, Best Buy, The Home Depot, B&H, and Grainger.
Things that are NOT allowed: