The Buoyancy Aid is developed by Besto (part of Lankhorst-Taselaar) and Kawasaki Motors Europe. The (swimming) vest is made of soft neoprene fabric with additional foam panels to provide maximum comfort. The design is made to match our modern Jet Ski PWC and is unisex. Available in size Youth to XXL. The stretch material ensures a tight fit and maximum mobility compared to Nylon vests. Conveniently a size chart is printed inside each vest. Specifications: Equipped with a D-ring to attach to the emergency cord. ISO-certified and CE-approved.EN ISO 12402-5 Size chart - Chest diameter (cm): XXS (Youth): 64-74 XS: 76-84 S: 84-94 M: 94-104 L: 104-114 XL: 114-124 XXL: 124-135