The 2XU WOMEN'S FEMME TRI SINGLET utilizes a chlorine resistant lycra fiber called SBR Skin-X to help keep your garment fitting like new for longer. With excellent stretch and recovery property, the fabric in this garment works with your body movement while retaining its shape. The polyamide yarn enhances moisture management capability as you transition from one sport to the next. Another fabric used is the Sensor Mesh-X which is nylon lycra fiber with high filament hydrophobic nylon yarn and optimal air flow engineering, sensor mesh-x represents the ultimate in moisture management. This garment is abrasion resistant and built to last through demands of swim/bike/run while still giving you unparalleled comfort. The racer back design and moisture wicking shelf bra offer a race solution as elegant as it is functional.