Cache-Coeur translates from French as "hide the heart" and is used in the French dance world to describe the crossover tops ballerinas wear. This romantic term for the short wool vest does both hides and warms the heart. Picture, a knitted bolero in wool.
"I mean that my heart unto yours is knit, so that but one heart we can make of it." (From A Midsummer Night's Dream, William Shakespeare)