Details, Size & Fit. Recommended for running and training. Relaxed and lightweight, The Just Relax Tank by Lorna Jane is perfect for hitting your next dance class. The low-cut sides ensure you stay cool during high-intensity workouts. Our model.is wearing a size small tank. Relaxed fit Lightweight construction Navy hue Scoop neckline Low-cut sides Two-way stretch fabric.fabric / material: NA.Materials: 50% Polyester, 38% Cotton & 12% Viscose.SKU: LO569SA75PBK.