TRILOGY DELTA ORIGIN SS M. Alpinisme. Polartec Maille. ACTIVE FIT™. Main Fabrics : POLARTEC® POWERDRY DELTA // 65% Polyester - 32% Lyocell - 3% Elastane. The POLARTEC® DELTA™ fabric from this performance top designed for high-output activities is made of a Lyocell blend with a specific refreshing structure. The raglan sleeves prevent friction caused by the backpack. Lightweight breathable material. Round neck. Short sleeves. Exclusive Trilogy print. Raglan sleeves for improved mobility.