This package includes 4 50N ISO-certified vests in a ventilating, transparent bag. All certified in accordance with ISO 12402.5 and are 'one size fits all' to keep your day on the water easy. Store this bag in your boat and you're always ready and permitted to go. Specifications: - 50N ISO-certified (buoyancy aid) - Always a perfect fit: more comfort and safety - Safety D-ring attachment to attach an emergency cord - Strong & lightweight nylon fabric - Unisex fit - Ventilating transparent bag - Adjustable sizing due to open sides - Water drainage system - Adjustable webbing strap: 1" | 2,5cm (3x) - Lightweight EPE-foam - Package: 4 vests - Strong YKK Buckles