UGG expanded beyond its iconic sheepskin boots in the 2000s to include fashion-forward styles like the Highkoo slouch boot. These boots combined UGG's comfort-focused design philosophy with contemporary fashion trends, offering a relaxed silhouette that became popular in the late 2000s and early 2010s. UGG slouch boots appeal to women seeking comfortable, casual footwear with brand recognition and versatility for everyday wear. The Highkoo style represents UGG's evolution from purely functional winter boots to lifestyle fashion pieces that maintain the brand's signature comfort while embracing modern aesthetics.