Phase Series: Moisture wicking base layer for interval activities. SL: Super Light. Uses the lightest weight materials available to provide high weather protection, performance and/or packability, but with the right amount of durability. This super-light base layer is engineered for optimal moisture management during stop-and-go activities. During active phases moisture is wicked across the entire garment, aiding temperature regulation. Entering a rest phase the broadly dispersed moisture evaporates quickly, speeding dry-time to keep the user drier and more comfortable. Encapsulated silver-ions provide durable and long-lasting odour control. Features: Moisture-wicking Breathable Durable Quick-drying Minimal odour retention Hydrophobic materials will not absorb water Mechanical stretch textile for unrestricted mobility-fabric is inherently stretchy without the use of Spandex fibres, making it more durable Anatomical shaping for fit and comfort Gusseted underarms Crew neck Long sleeves Non-chafing label Next-to-skin Fit Weight: 100 g / 3.5 oz Activity: All Round Materials: Phasic(TM) SL-70% polyester, 30% polypropylene, UPF 25, 98 g/m . Reduced yarn size of polypropylene lends soft touch to 100% hydrophobic jersey knit textile with mechanical stretch. Composed of multidimensional polyester yarns that wick moisture laterally to dry quickly, plus polypropylene yarns that have silver-ion encapsulated into the fibre for long-lasting odour control. Very light weight with a smooth outer face that slides easily under other layers.