Delta Series: Air permeable mid layer fleece garments with differing degrees of thermal efficiency. LT: Lightweight. Built with highly durable top performance materials but designed with a streamlined minimalist set of features to provide very light weight. Ideal as a lightweight mid layer or warm base, this trim pullover exhibits a high warmth to weight ratio, wicks moisture, and dries quickly. A deep half zip regulates body temperature and gender specific shaping ensures even insulation and bulk free layering comfort. Features: Moisture wicking Breathable Insulated Great warmth to weight ratio Lightweight Quick drying No lift gusseted underarms Trim, slim fit, increases breathability during high output Standard collar 12 front zip to improve venting Trim Fit, Hip Length Weight: 195 g 6.9 oz Activity: SkiSnowboard Alpine Climbing Hiking Trekking Materials: PolartecR Classic 100 Micro Velour Small Grid 100% polyester, 152 gm . This fabric rapidly wicks moisture away from the skin, while still being highly breathable and ultra light.