A boat coat, dive coat, or swim parka is a versatile tool that benefits those who enjoy a variety of water sports. For most of us, thinking of the beach brings to mind warm sunny days soaking up the sun with no concern for ever being cold. For an athlete who ventures beyond the beach to enjoy water sports, the temperature changes that come from going into the water and back out give them a completely different perspective. A boat coat is made to be worn by divers and surfers who venture out into the deeper, and more frigid, waters of the ocean where their body temperature can drop much faster than it does in dry air. A dive coat can be worn to get them warm before they enter the water and put back on once they leave the water to bring their body temperature back up to normal.