Phase Series: Moisture wicking base layer for interval activities. AR: All Around. Provides high performance weather protection and highlights a range of features to give All Around versatility in multiple activities. Mid weight, crew neck base layer appropriate for cooler temperatures, high output activities. Hybrid mapping of PhasicTM AR in the body and PhasicTM SL in the underarm area fabrics in addition to the flatlock construction and comfortable next to skin fit eliminates excess bulk and rapidly transfers moisture for efficient evaporation. Benefits include improved temperature regulation and layering. Features: Moisture wicking Breathable Durable Quick drying Minimal odour retention Hydrophobic materials will not absorb water Mechanical stretch textile for unrestricted mobility Anatomical shaping for fit and comfort Gusseted underarms Crew neck Long sleeves Non chafing label Next to skin Fit Weight: 135 g 4.8 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. PhasicTM AR 87% polyester, 13% polypropylene, UPF 50, 145 gm . Double knit textile with mechanical stretch composed of multi dimensional 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. The smooth outer face is durably pill resistant and a lightly lofted interior adds light insulation.