Crewsaver Spiral 100 Childrens Lifejacket Buoyancy AidPerfect for inshore use such as surface water sports and swimming The Spiral's inherent buoyancy offered by the foam reduces fatigue during general in water activities and is available in a range of sizes suitable for children and adults. All sizes offer 100N of buoyancy with the baby and child sizes being fully rated as an ISO 12402 4 approved lifejacket. This means that these sizes will fully support the wearer in the water and work to rotate them