Why should your dog wear one? Because of body heat. Your dog begins to lose crucial body heat sooner than you might think. Water temperatures below 55°, sub-40° air temps and 20+ mph winds are prime conditions for deadly canine hypothermia to occur. A Neoprene Dog Parka traps your dog's body heat helping his coat dry faster while reducing energy zapping shivering. It also provides floatation and protection that your dog needs to perform its important job for you.