Even if you don't have a beau to actually borrow from, you can still get in on the "I-raided-his-closet" fun with a pair of slouchy low-slung jeans. (Bonus points if they look a little lived-in).
Cash: Women's The Boyfriend Button-Fly Jeans in Jackson, $34; oldnavy.com
Charge: Boyfriend Angie Jeans, $69.99; mango.com
Since the palette du jour is olive, gunmetal, khaki and camouflage print, we're totally feeling the army appeal. Instead of sporting a head-to-toe utilitarian uniform, look tough enough with an army jacket worn over your favorite strappy sundress.
Cash: Zara Combined Army Jacket, $99.90; zara.com
Charge: Current/Elliott The Infantry Cotton-Twill Jacket, $270; net-a-porter.com