It has two systems to inflate – a pill in the jacket that dissolves when it hits water and causes the jacket to inflate (this is for when the person wearing the jacket is unconscious); and a pull handle that inflates the jacket when pulled by the person wearing it. It also has a back-up inflation tube which can be blown into by the swimmer.
May dalawang sistema ito upang hanginan – pildoras sa jacket na natutunaw kapag nabasa at hinahanginan ang jacket (kung ang may suot ay walang malay); at hawakang hinihila ng taong may-suot. Mayroon din itong back-up na inflation tube na mahihipan ng manlalangoy.