Knowledge, affects a consumer’s decision-making process which make their attitude positive to admit sustainable practices. The Present study was conducted purposively selected college going girls belonging to four girls’ colleges of Jaipur city to impart knowledge and assess the impact of knowledge session towards eco fashion. There was a significant gain in knowledge of the respondents regarding meaning of eco fashion, roots of unsustainability, health hazards of synthetic fabrics, treatments of fabrics and 3 Rs of sustainability. The results revealed that t value was greater than tabulated value and found significant. Therefore, it can be concluded that session exposure had increased the knowledge of college going girls regarding various aspects of eco fashion. From the study it was inferred that respondents had changed their knowledge regarding various aspects of eco fashion and sustainability. The study also revealed that awareness package was highly appreciated and accepted by the respondents based on content coverage and overall presentation.