When you're stand up paddleboarding and don't want to be bothered by a big and bulky life vest, just wear the NRS Zephyr Self Inflating PFD around your waist for some added peace of mind. The system is worn around the waist and can be instantly inflated with the just the pull of a cord thanks to a CO2 powered inflation device. Once inflated, the Zephyr provides up to 15. 5lb of flotation, making it a type III PFD. When things really go bad, a mouth valve option allows the PFD to be inflated manually.