ONYX A-24 Red In-Sight Auto Inflate L Automatically inflates upon immersion in water or when wearer pulls the Jerk to Inflate handle Equipped with back-up oral inflation In-Sight - shows GREEN if the product is armed and ready to use; shows RED if not ready to use Provides comfort, safety, and peace of mind, without knowing you have it on, until you may need it Soft extended neoprene neckline for all day comfort