Delta Series: Air permeable mid layer fleece garments with differing degrees of thermal efficiency. LT: Light Weight. Built with highly durable top performance material 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 wickin Breathable Insulated Great warmth to weight ratio Lightweight Quick drying No lift gusseted underarms Standard collar 12 front zip to improve venting Trim Fit, Hip Length Weight: 240 g 8.5 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.