the hair strands 4 to preserve its shape as it existed at the time that heat was applied to it the ultimate result will be that the hair strand 4 will emerge from the hair styling iron 1 significantly straighter and substantially better styled than if the present invention was not utilized the type and arrangement of comb teeth bristles in a particular comb teeth bristles element 14 may be more effective in straightening the hair strand 4 than another type and arrangement of comb teeth bristles in another comb teeth bristles element 14 because different types and thicknesses of hair may behave differently upon application of different types and arrangements of comb teeth bristles perhaps thinner hair may become better straightened upon the application of high density narrow body comb teeth bristles 14 c alternatively thicker hair may become better straightened upon the application of low density wide body comb teeth bristles 14 a the present invention offers the significant feature of easy convenient and quick interchangeability of different comb assembly elements 12 that have different comb teeth bristles elements 14 to remove a comb assembly element 12 the user need only dislodge and remove the securing clip element 16 from the.