Why hide that slim waist? Khloe Kardashian covers up in a large hoodie as she sips a healthful smoothie after gruelling morning workout

She's often boasting about her big weight loss on her Twitter and Instagram.

But instead of her usual -- proudly parading her slimmer figure in summer shorts and skin tight jeans -- Khloe Kardashian opted for a rare cover-up as she left the gym on Monday in Los Angeles.

The 29-year-old threw on a dark hooded sweatshirt big enough to have come from her husband Lamar Odom's closet, flapping around her wrists and hitting her near her knees.