Returns reduction
Fashion brands reduce returns by improving shopper confidence before checkout, not by making the checkout harder. The best returns-reduction work improves product understanding, fit confidence, and expectation-setting while still protecting conversion.
Many brands over-focus on restrictive policies or post-purchase friction. That can reduce return requests at the margin, but it can also harm trust and depress conversion. The stronger route is to help the shopper make a better decision earlier.
Virtual try-on is useful because it addresses a common source of hesitation: "I like the garment, but I cannot picture it on me." For suitable categories, answering that question earlier can improve confidence and reduce speculative ordering behaviour.