In good condition
The Dakine Sonic is a classic, legacy hybrid kiteboarding and windsurfing seat harness. It was highly regarded for offering the high back support and low tow-point of a traditional seat harness but built without the leg straps typically found on models like the Dakine Fusion. This design provides heavy-duty lower back relief while completely eliminating the inner-thigh chafing and leg restriction common with seat harnesses.
This harness comes with a very nice windsurfing spreader bar and hook.