This collaborative eTwinning project brings together students from Slovenia, Hungary and Spain (with potential for more countries) to explore the impact of fast fashion on the environment and society. Through research, discussions, and creative activities, students will critically assess sustainability claims, identify greenwashing, and promote eco-friendly clothing choices. Key activities include a logo contest, surveys, workshops on upcycling, and an Earth Day campaign. The project fosters cultural exchange, multilingual communication, and responsible consumer habits, culminating in a final showcase of sustainable fashion solutions.