So supportive and ready for anything, this square neck sports bra was designed for high-impact activities with a snug and compressive fit and a bold strappy back. Supportive under bust elastic Four-way stretch Sweat-wicking fabric Under Bust: 13.5" flat / 16" stretch Body: 80% Polyester / 20% Elastane Lining: 75% Polyamide / 25% Elastane new without hang tag / brand tag, black lined to prevent store return. May have been tried on in store / new condition.