Athletic Cotton/Lycra (95/5%) Workout Tank Top with Contrast Trim. Black/teal Soft, premium 9oz fabric, 95% Cotton and 5% Lycra Spandex. A blend of Spandex, also know as Elastane worldwide, makes it an even-better-fitting garment. The racerback design is sometimes referred to as a Y-Back, T-Back. Proudly made in the USA and we thank each of you that support our efforts.