Delta Jacket Men's is a durable lightweight fleece designed for climbing and hiking, built as a lightweight thermal layer that stays breathable and durable for mountain use. Product Type: Men's durable fleece Material: bluesign® Approved Materials Weight: 240g / 8.5 oz Octagonal hollow-core construction improves warmth-to-weight ratio Smooth face supports easy layering and improved durability Trim fit with low-profile seams helps reduce chafing while moving Layer it under a men’s shell jacket and wear with men’s hiking pants for climbing and hiking days. A new type of fleece, a new level of performance. Still soft, still breathable, it’s elevated with an innovative octagonal hollow-core construction for a much better warmth-to-weight ratio and a smooth face for easy layering and improved durability. A trim fit patterned to move and low-profile seams that reduce chafing combine to create a technical, comfortable fleece for all your mountain missions. Size and fit tip: The Deltas offer a roomier fit in the body and sleeves than their predecessors, for improved comfort, versatility, and freedom of movement during high-output activities.