MicroFilament Polyester Yarn with hydrophobic properties, providing excellent next to skin comfort, drape and superior moisture management performance. Denier Grading – the lower denier (finer) yarn on the outside of fabric draws moisture through from higher denier (thicker) yarn on inside – this capillary effect keeps you comfortable and dry, allowing the moisture to evaporate on the outside of the garment. Mechanical Stretch allows subtle movement keeping the garment aligned with your movement. Hydrophobic Channelled yarn so moisture runs along channel and not into yarn, so fabric doesn’t cling to body. Lightweight Fabric allowing you to feel race ready and fast.