Please have a look at my Diy Foamlifejackets on Flickr(lifevest xeno).I am a Inventor and create my only Lifejackets, cause I cant find a perfekt one.I often see child lifejackets with a crochstrap like a panty and i thought this is the best design, but there where no one for adult (instead of the very expensive "professional" "one size fits all" Regatta Thermocuise) so I buy two old lifejackets and conect them and renew the foam straps and buckels...