The North Shore Lifeguard Association (NSLA) consists of over 40 lifeguards on the North Shore of Oahu who must be prepared to respond to emergencies in the intense surf. NSLA members use OtterBox Preserver waterproof smartphone cases to stay connected and use apps to track conditions, locate people in distress with GPS, and communicate directly during rescues. The waterproof cases allow the lifeguards to rely on their phones for work without worrying about damage even when phones get wet or are accidentally dropped.