Slim fit: This garment fits close to the body for a more streamlined look.During high-output alpine activities, the Summit Pro 120 Long-Sleeve Top delivers lightweight warmth and exceptional moisture management to keep you cool and dry. It harnesses a blend of FlashDry ; and DotKnit technology that pulls moisture from the skin before expelling it to the outside, helping you to maintain an even body temperature. Raglan sleeves and underarm gussets combine for better mobility, and there are minimal seams that reduce bulk when worn under layers.