Phase Series: Moisture wicking base layer for interval activities. SL: Super Light. Uses the lightest weight materials available to provide high weather protection, performance andor 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: PhasicTM SL 70% polyester, 30% polypropylene, UPF 25, 98 gm . 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.