Compression: The lifejacket may be compressed from many years of stowage.
Loss of resiliency: The lifejacket is excessively hard, stiff or its foam is brittle. Normally after compressing the lifejacket to about half its initial thickness, the foam should expand to its original dimension in a short period of time.
Shrinkage: A physical reduction in size may be indicated by "wrinkling" of the coating on vinyl dipped type or by a loose fitting shell on a fabric-covered lifejacket.
Manufacturer: While the potential for problems applies to all older PFDs, those manufactured by "The Safeguard Corporation" should be closely examined.