Lifejackets
Lifejackets were developed for professional mariners in the event of emergencies at sea. They were designed to account for more extreme wave conditions, and greater risk of injury to the wearer during abandonment situations. A lifejacket is required to turn an unconscious person to a face-up position, and hold their mouth above the water. These performance requirements cause lifejackets to be very bulky in front, and thus not as comfortable.
