The 2010s were defined by hipster fashion, athleisure, a revival of austerity-era period pieces and alternative fashions, swag-inspired outfits, 1980s-style neon streetwear, and unisex 1990s-style elements influenced by grunge and skater fashions. The later years of the decade witnessed the growing importance in the western world of social media influencers paid to promote fast fashion brands on Pinterest and Instagram.