Some of my close friends refer to my closet as the Lending Library. In they go to pull a few articles of clothing and days later return them, dry cleaned and good as new. Turns out I've just discovered my own library. It's called , and this New York-based mobile app allows you to borrow pieces from an expertly curated lineup of couture, ready-to-wear, and accessories, along with the option of hiring a professional stylist to assist with day-of dressing needs. Last week, I put Armarium to use (minus the stylist!) and borrowed the new and already sold-out-everywhere dress, above. The dress retails for $1660, but I rented it for 4 days for $250. Armarium focuses on major statement dresses, and inventory is constantly updated, so there's always something new to wear! To check out this "library" and download the app on your phone, click . P.S. Use the code LECATCH15 to get 15% off your first purchase!

Photo: Stefanie Keenan