This document presents a dissertation proposal that aims to investigate the influence of store environment on male impulse buying behaviour at H&M. The study will critically review literature on store atmospherics and gender differences in shopping behavior. It will develop hypotheses based on a past study about how ambient, design, and social factors may impact urge to buy and affect. A quantitative methodology is proposed, adapting a past survey to collect data from over 100 male H&M customers. The results will analyze relationships between store environment, affect, urge, and impulse purchases to better understand male shopping behavior in the fast fashion context.