2XU Men's Comp Tri Singlet Versatile triathlon singlet complements NeoSport's Comp Tri Short, and utilizes SBR SKIN X fabric for quick-drying, breathable comfort Flat lock seams, streamlined cut, and lira fibers provide comfortable fit that moves with your body and enhances freedom of movement Semi-lock zip controls air flow, while strategically-placed Sensor Mesh ventilation panels further promote airflow Sensor MESH X offers improved moisture management and airflow; Invista lira assures compression comfort and long-term recovery memory SPR SKIN X 70-denier Lycra fiber yarn offers heightened compression; improved endurance for racer and durability for garment