Cap having expansible back

A cap, comprising a crown being conjoined at a front end with a visor and at a back end with an expansible portion, said expansible portion extending substantially along the entire rear cap periphery and being attached to said crown substantially between opposite ends of said visor, said expansible portion being configured to resiliently accommodate different user head sizes, said expansible portion including an outer peripheral edge adapted to follow the contours of said front end of said crown, said outer peripheral edge residing substantially in the same plane as said front end of said crown.

A cap, comprising a crown being conjoined at a front end with a visor and at a back end with an elongated expansible portion, said elongated expansible portion extending substantially along the entire rear cap periphery and being attached to said crown substantially between opposite ends of said visor, said elongated expansible portion being configured to resiliently accommodate different user head sizes, said elongated expansible portion including an outer peripheral edge being disposed at a lower elevation than said front end of said crown.