This study evaluated currently marketed sports bras on subjective measures of comfort and support both within an entire group of women and within cup sizes, correlated the subjective measures of comfort and support with previously reported biomechanical findings of support on the same bras, and further developed empirically based guidelines for the design of sports bras for small-, medium-, and large-breasted women. Fifty-nine subjects completed a questionnaire to assess subjective reactions to comfort and support of seven currently marketed sports bras after engaging in vigorous exercise in each bra for 20 minutes. Statistically significant differences in mean comfort and support scores among the seven styles of bras for the entire group and within cup sizes were revealed. Pearson correlation coefficients among comfort, support and displacement by bra style indicated that four of the bras performed significantly better than the remaining three, although none of the bras rated high in all three criteria. Design characteristics of the bras coming closest to this criterion (and the bras rated at least desirable) are discussed, along with recommendations for future sports bra research. A list of references and eight tables of data are appended. (Author/JD)