Calvin Klein Performance Cross Back Bra. Update your active wear with this Calvin Klein Performance Cross Back Bra. Crafted with slim shoulder straps which create a cross back style, it features a thick elasticated chest band, finished with signature Calvin Klein Performance branding.Size selection: British sizing (Standard sizing)Fits true to size, take your normal sizeRegular fitBody: 76% polyester, 24% elastaneMesh body lining: 86% polyamide, 14% elastaneBottom band: 75% polyamide, 18% polyester, 7% elastaneMachine washableProduct code: 341023