TikTok certainly isn't lacking on sartorial cores, but the latest trend is more functional than ever. With more shoppers swapping out their everyday basics in favor of elevated, business attire, the new aesthetic signifies a unique transition in fashion — one where workwear is getting the streetwear treatment. This season, it's all about corpcore.

Corpcore fashion (short for corporate core fashion) takes all the office staples you already know and love and reimagines them through a more modernized lens. It's Rachel Green with a splash of Gisele Bündchen's Y2K style in "The Devil Wears Prada" and Victoria Beckham in everything ever. Pinstripe suits are a focal point, collared shirts are aplenty, and casual pieces like T-shirts are used to further blur the lines between streetwear and workwear.

To understand the trend in its entirety, we tapped Bella Gerard , Rakuten 's shopping and trend advisor, for her expert insight on how TikTok's corpcore craze is expanding the reach of office attire, plus all the ways you can experiment with the aesthetic this fall. What Is Corpcore? Corpcore rewrites the usual 9-to-5 dress code rules with styles that are designed to take you from the office to cocktails and beyond. As Gerard explains, the fashion trend speaks to a larger shift within our work culture, where shoppers are "blending office wear with evening-ready outfits" for a streamlined wardrobe.

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it's Rachel Green with a splash of Gisele Bündchen's Y2K style in "The Devil Wears.