This set consists of 4 buoyancy aids with a performance level of 50 and is a perfect personal flotation device when you go sailing, surfing, boating, swimming or practising other water sports.They can also be used to give inexperienced swimmers more confidence. The buoyancy aids are made of 100% polyester with PE foam padding. The drawstring closure and the adjustable waist belt ensure the proper fit so the vest will stay in place, even when you fall into the water. The buoyancy aids have been tested by a notified body according to the European standard EN ISO 12402-5. Delivery includes 4 buoyancy aids. Buoyancy aids with a buoyancy rating of 50 N are intended for competent swimmers in sheltered waters. These personal floatation devices have minimal bulk, but they are of limited use in rough waters, and cannot be expected to keep the user safe for a longer period of time. They do not have sufficient buoyancy to protect people who are unable to help themselves and require active participation from the user.