Mustang's new line of Deluxe Inflatable PFDS combine the advanced safety of inflatable technology with new product enhancements such as a safety inspection window to readily tell users if the inflator is ready for use and a neoprene comfort collar to eliminate neck irritation, to offer a superior inflatable PFD. Made for sailors and power boaters alike, the MD3083 automatically inflates when the wearer is immersed in water and is lightweight and close-fitting to ensure it doesn't interfere with regular activities. #MTMD3083 CANNOT BE SHIPPED VIA AIR. PLEASE ALLOW TIME FOR GROUND SHIPPING.