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-wicking Breathable Insulated Great warmth-to-weight ratio Lightweight Quick-drying No-lift gusseted underarms Standard collar 1/2 front zip to improve venting Trim Fit, Hip Length Weight: 240 g / 8.5 oz Activity: Ski/Snowboard / Alpine Climbing / Hiking / Trekking Materials: Polartec(R) Classic 100 Micro Velour Small Grid-100% polyester, 152 g/m . This fabric rapidly wicks moisture away from the skin, while still being highly breathable and ultra light.