Details, Size & Fit. Recommended for training. Made from The brand's LITE POWER X fabric, The 2XU Women's Plyometric Y-Back Crop has superior moisture management, abrasion resistance and antibacterial protection. Ourmodel. iswearing a size small crop. She usually takes a Standard AU8/small size, is 5’9”(175cm)tall and has a 61cmwaist. LITE POWER X fabric Scoop neckline Y-back design Elasticised band under The bust for support Rubberised branding on The back Mesh lining.Cold machine wash. fabric / material: NA.Materials: Main: 87% Polyester & 13% Elastane.SKU: 2X445SA42ZJD.