Fast in the water & quick drying on l&, the 2XU Active Tri Short also boasts an updated waistband concealed with power mesh for unparalleled comfort. Extras include high filament SBR Fleece chamois for the bike & 50+ UV protection from the sun. Check out the full 2XU tri range here. Check out the 2XU wetsuit range here. SBR 1: Impressive moisture management 2: Maximum airflow 3: Stability + muscle vibration control with excellent stretch + recovery 4: UPF 50+ sun protection