Made for recreational enthusiasts and professionals alike, the MTMD3085 sports a manual inflation system and is lightweight and close-fitting to ensure it doesn't interfere with daily activities. Manually-activated inflatable PFDs are inflated by pulling the inflation cord that hangs from the PFD at waist-height. They will not inflate when they get wet or are immersed in water. Manually-activated PFDs are a great choice for activities such as paddling, wade-fishing and swimming where there is a reasonable chance you will end up in the water and are confident you will be able to pull the inflation cord when you need it. They are also ideal for situations where control over PFD inflation is desired.