Product name: Life jacket / bathing suit/water sports coat (with whistle)
Specification: suitable for a friend of 3 feet in chest, length: 56CM, width: 40CM
Weight: 280 grams (difference of other merchant's lighter-weight life jackets)
Buoyancy: the floating force can withstand the national standard buoyancy of more than 7.5 kg.
Material: Oxford cloth
Buoyant material: polyethylene foam