In this article, data on true-spiral angles in respect to the same 12 cotton varieties grown at different agroclimatic locations and in different crop years in India are presented and discussed. It has been concluded that the values of true-spiral angles are different for different varieties but within a variety remain practically invariant irrespective of the location and environmental conditions of growth. The parameter therefore appears to be genetic in origin. It is believed that this information can be suitably exploited by progressive cotton breeders for evolving high-strength cottons, keeping in view the demand of the modern cotton processing technologies.