Life-jackets:

Life-jackets:

An adult life-jacket shall be so constructed that: 
™ shall not sustain burning or continue melting after being totally enveloped in a fire for a
period of 2 seconds.
™ at least 75% of persons, who are completely unfamiliar with the lifejacket, can correctly don
it within a period of one min without assistance, guidance or prior demonstration;
™ after demonstration, all persons can correctly don it within a period of one minute without
assistance;
™ it is clearly capable of being worn in only one way or, as far as is practicable, cannot be
donned incorrectly;
™ it is comfortable to wear; 
™ it allows the wearer to jump from a height of at least 4.5 m into the water without injury and
without dislodging or damaging the lifejacket.