The parameter of weight was investigated to determine the correct poundage of a portable product for the 5-95 percentile male and female consumer. The concept of portability appears to be culturally inspired such that men and women do not differ in the amount of weight which they feel is portable. Men, however, tend to use approximately 30% of their maximum isometric arm strength when carrying what they feel to be a portable object, while women utilize slightly over 40% of their maximum isometric arm strength to carry the same weight. For the subject group as a whole the correct maximum portable weight ranges from 4.5 kg. at the fifth percentile to 10.2 kg. at the ninety-fifth percentile. The fiftieth percentile maximum portable weight was found to be 7.3 kg. In addition wrist rotation strengths in the vertical upright position used for one-handed carry were recorded for the 5-95 percentile male and female to aid in the determination of correct handle placement and case balance.