Calvin Klein Everyone from Jourdan Dunn to Vanessa Hudgens has taken selfies in Calvin Klein Underwear's 'Modern Cotton' bra. Free from underwiring for light but comfortable support, this racer-back style is made from the perfect blend of cotton, modal and stretch. It's finished with the brand's logo-embroidered elasticated band to match the coordinating briefs. Wear it with: Chan Luu Earrings. - White stretch cotton-blend, white and black elastic - Slips on - 53% cotton, 35% modal, 12% elastane - Machine wash